Add repository links to approach pages

- Add generic 'repositories' array structure to approach front matter
- Link approaches to their GitHub implementation and replication repositories
- Update approach.liquid layout to display repository links with GitHub icons
- Support multiple named repositories per approach (implementation, replication packages, versions)
- All repository URLs verified to exist in ardoco organization

Author: dfuchss

_approaches/arcotl.md

@@ -4,6 +4,11 @@ description: ArCoTL – TLR between Software Architecture Models and Code.
 permalink: /approaches/arcotl/
 importance: 2
 layout: approach
+repositories:
+  - name: Implementation
+    url: https://github.com/ardoco/tlr
+  - name: Replication Package (ICSE 2024)
+    url: https://github.com/ardoco/Replication-Package-ICSE24_Recovering-Trace-Links-Between-Software-Documentation-And-Code
 ---
 
 ![ArCoTL Overview](/assets/img/approaches/icse24-transarc.svg){:width="100%" style="background-color: white; border-radius: 8px; padding: 10px; display: block; margin: 0 auto;"}

_approaches/ardocode.md

@@ -4,6 +4,11 @@ description: ArDoCode – TLR between Software Architecture Documentation and Co
 permalink: /approaches/ardocode/
 importance: 5
 layout: approach
+repositories:
+  - name: Implementation
+    url: https://github.com/ardoco/tlr
+  - name: Replication Package (ICSE 2024)
+    url: https://github.com/ardoco/Replication-Package-ICSE24_Recovering-Trace-Links-Between-Software-Documentation-And-Code
 ---
 
 ![ArCoTL Overview](/assets/img/approaches/icse24-ardocode.svg){:width="100%" style="border-radius: 8px; padding: 10px; display: block; margin: 0 auto;"}

_approaches/exarch.md

@@ -4,6 +4,11 @@ description: "ExArch – LLM-based Architecture Component Name Extraction for TL
 permalink: /approaches/exarch/
 importance: 4
 layout: approach
+repositories:
+  - name: Implementation
+    url: https://github.com/ardoco/tlr
+  - name: Replication Package (ICSA 2025)
+    url: https://github.com/ardoco/Replication-Package-ICSA25_Enabling-Arch-Traceability-by-LLM-based-Arch-Component-Name-Extraction
 ---
 
 ![ExArch Overview](/assets/img/approaches/icsa25-transarc.svg){:width="100%" style="background-color: white; border-radius: 8px; padding: 10px; display: block; margin: 0 auto;"}

_approaches/inconsistency-detection.md

@@ -4,6 +4,11 @@ description: Documentation-Model-Inconsistency-Analysis pipeline.
 permalink: /approaches/inconsistency-detection/
 importance: 8
 layout: approach
+repositories:
+  - name: Implementation
+    url: https://github.com/ardoco/inconsistency-detection
+  - name: Replication Package (ICSA 2023)
+    url: https://github.com/ardoco/DetectingInconsistenciesInSoftwareArchitectureDocumentationUsingTraceabilityLinkRecovery
 ---
 
 ![Approach Overview](/assets/img/approaches/icsa23-inconsistency.svg){:width="100%" style="background-color: white; border-radius: 8px; padding: 10px; display: block; margin: 0 auto;"}

_approaches/lissa.md

@@ -4,6 +4,11 @@ description: LiSSA – LLM/RAG-based TLR.
 permalink: /approaches/lissa/
 importance: 6
 layout: approach
+repositories:
+  - name: Implementation
+    url: https://github.com/ardoco/lissa-ratlr
+  - name: Replication Package (ICSE 2025)
+    url: https://github.com/ardoco/Replication-Package-ICSE25_LiSSA-Toward-Generic-Traceability-Link-Recovery-through-RAG
 ---
 
 ![LiSSA Overview](/assets/img/approaches/icse25-lissa.svg){:width="100%" style="background-color: white; border-radius: 8px; padding: 10px; display: block; margin: 0 auto;"}

_approaches/secdreqan.md

@@ -4,6 +4,9 @@ description: SecDReqAn – TLR for Security Requirements.
 permalink: /approaches/secdreqan/
 importance: 7
 layout: page
+repositories:
+  - name: Implementation
+    url: https://github.com/ardoco/secdreqan
 ---
 
 🚧 This approach is not available yet.

_approaches/swattr.md

@@ -4,6 +4,11 @@ description: SWATTR – TLR between Software Architecture Documentation and Soft
 permalink: /approaches/swattr/
 importance: 1
 layout: approach
+repositories:
+  - name: Implementation
+    url: https://github.com/ardoco/tlr
+  - name: Replication Package (ECSA 2021)
+    url: https://github.com/ardoco/SWATTR
 ---
 
 ![SWATTR Overview](/assets/img/approaches/ecsa21-swattr.svg){:width="100%" style="border-radius: 8px; padding: 10px; display: block; margin: 0 auto;"}

_approaches/transarc.md

@@ -4,6 +4,11 @@ description: TransArC – TLR between Software Architecture Documentation, Model
 permalink: /approaches/transarc/
 importance: 3
 layout: approach
+repositories:
+  - name: Implementation
+    url: https://github.com/ardoco/tlr
+  - name: Replication Package (ICSE 2024)
+    url: https://github.com/ardoco/Replication-Package-ICSE24_Recovering-Trace-Links-Between-Software-Documentation-And-Code
 ---
 
 ![TransArC Overview](/assets/img/approaches/icse24-transarc.svg){:width="100%" style="background-color: white; border-radius: 8px; padding: 10px; display: block; margin: 0 auto;"}

_approaches/tv.md

@@ -4,6 +4,11 @@ description: "Trace View: a viewer for trace links."
 permalink: /approaches/tv/
 importance: 9
 layout: page
+repositories:
+  - name: Implementation (v2)
+    url: https://github.com/ardoco/traceview-v2
+  - name: Implementation (v1 - Legacy)
+    url: https://github.com/ardoco/traceview-v1
 ---
 
 ARDoCo-TV is a tool for visualizing trace links between software artifacts, supporting the analysis and understanding of traceability in software projects.

_layouts/approach.liquid

@@ -5,6 +5,20 @@ layout: page
   {{ content }}
 </article>
 
+{% if page.repositories %}
+  <section>
+    <h2>Links</h2>
+    <ul>
+      {% for repo in page.repositories %}
+        <li>
+          <i class="fa-brands fa-github"></i>
+          <a href="{{ repo.url }}" target="_blank" rel="noopener noreferrer">{{ repo.name }}</a>
+        </li>
+      {% endfor %}
+    </ul>
+  </section>
+{% endif %}
+
 {% assign project_title = page.title %}
 {% assign related = site.conferences | where_exp: 'conf', 'conf.approaches contains project_title' %}
 {% if related.size > 1 %}