added templates for PRs and creating issues

Author: martinmitrevski

.github/CODEOWNERS

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+* @GetStream/ios-developers

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+## What did you do?
+
+
+## What did you expect to happen?
+
+
+## What happened instead?
+
+
+## GetStream Environment
+**GetStream Chat version:**
+**GetStream Chat frameworks:** StreamChat, StreamChatSwiftUI
+**iOS version:**
+**Swift version:**
+**Xcode version:**
+**Device:**
+
+## Additional context

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+about: Got any ideas about new features? Let us know!
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+## What are you trying to achieve?
+
+
+## If possible, how can you achieve this currently?
+
+
+## What would be the better way?
+
+
+## GetStream Environment
+**GetStream Chat version:**
+**GetStream Chat frameworks:** StreamChat, StreamChatSwiftUI
+**iOS version:**
+**Swift version:**
+**Xcode version:**
+**Device:**
+
+## Additional context

.github/PULL_REQUEST_TEMPLATE.md

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+### 🔗 Issue Link
+_Jira or Github issue link, if applicable._
+
+### 🎯 Goal
+
+_Describe why we are making this change._
+
+### 🛠 Implementation
+
+_Provide a description of the implementation._
+
+### 🧪 Testing
+
+_Describe the steps how this change can be tested (or why it can't be tested)._
+
+### 🎨 Changes
+
+_Add relevant screenshots or videos showcasing the changes._
+
+### ☑️ Checklist
+
+- [ ] I have signed the [Stream CLA](https://docs.google.com/forms/d/e/1FAIpQLScFKsKkAJI7mhCr7K9rEIOpqIDThrWxuvxnwUq2XkHyG154vQ/viewform) (required)
+- [ ] Changelog is updated with client-facing changes
+- [ ] New code is covered by unit tests
+- [ ] Affected documentation updated (docusaurus, tutorial, CMS (task created)

.github/stale.yml

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+# Number of days of inactivity before an issue becomes stale
+daysUntilStale: 20
+# Number of days of inactivity before a stale issue is closed
+daysUntilClose: 7
+# Issues with these labels will never be considered stale
+exemptLabels:
+  - pinned
+  - !important
+# Label to use when marking an issue as stale
+staleLabel: stale
+# Comment to post when marking an issue as stale. Set to `false` to disable
+markComment: >
+  This issue has been automatically marked as stale because it has not had
+  recent activity. It will be closed if no further activity occurs. Thank you
+  for your contributions.
+# Comment to post when closing a stale issue. Set to `false` to disable
+closeComment: >
+  This issue has been automatically closed due to inactivity. 
+  Please open a new issue if it's still valid.

CONTRIBUTING.md

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+# Contributing to Stream Chat SwiftUI SDK
+
+We're glad you want to contribute to the Stream team 🎉
+
+---
+
+_So you..._
+
+### Got stuck on something 💭
+
+Please check [stackoverflow](https://stackoverflow.com/questions/tagged/getstream-io) and ask your questions there.
+If your question is not generic, you can send us a [support request](https://getstream.io/support).
+
+### Found a bug 🐞
+
+Please create a github issue with as much info as possible (follow the Issue Template closely).
+
+### Have a feature request 📈
+
+Please create a github issue with as much info as possible.
+
+### Fixed a bug 🩹
+
+Please open a PR with as much info as possible: clear description of the problem and the solution.
+Include the relevant github issue number if applicable. 
+
+Make sure Changelog is updated correspondingly (we'll probably change wording but it'll help us immensely)
+
+Before submitting, please make sure you're finished with the PR (and all tests pass) and do not make changes until it's reviewed.
+
+### Implemented or changed a feature 🌈
+
+Guidelines on "Fixed a bug" part is applicable.
+
+## Our Release flow 🚀
+
+We make sure to follow all QA test procedure for minor and major releases. 
+
+We accumulate changes and release them in batches, unless high priority.
+We make sure to put staged changes (on default branch but not released in a version) as "Upcoming" in [CHANGELOG](https://github.com/GetStream/stream-chat-swiftui/blob/main/CHANGELOG.md).
+
+If possible, we deprecate stuff before removing them directly. Deprecated stuff will be removed after a minor release, and will include a migration/upgrade guide.