fix: packaging cleanup — .vscodeignore, .gitignore, branch guidance

Author: TheKrush

.gitignore

@@ -4,6 +4,7 @@
 .DS_Store
 .vscode-test
 dist
+DO_NOT_DELETE/
 node_modules
 out
 Thumbs.db

.vscodeignore

@@ -1,14 +1,17 @@
-!.vscodeignore
-!LICENSE
-!out/**
-!package.json
-**/*.map
 **/*.ts
-*.md
 .git/**
 .gitattributes
 .gitignore
 .vscode/**
+.vscodeignore
+DO_NOT_DELETE/**
+.github/**
 node_modules
+scripts/**
 src/**
-tsconfig.json
+tsconfig.json
+out/**
+!LICENSE
+!package.json
+!out/extension.js
+!out/extension.js.map

CONTRIBUTING.md

@@ -37,7 +37,7 @@ code --extensionDevelopmentPath=.
 
 ## How to Contribute
 
-1. **Fork or branch from `main`** — external contributors should fork; collaborators may create a feature branch.
+1. **Fork or branch from `master`** — external contributors should fork; collaborators may create a feature branch.
 2. **Create or link an issue** — reference an existing issue or open a new one outlining what you plan to do.
 3. **Make focused, readable commits** — group related changes, use clear messages, and describe *why* a change was made.
 4. **Add tests where appropriate** — update or add tests if the project has them; include validation steps for scripts or workflows.