Feat/beta release (#193)

* chore: update README version to 2.7.1

Updated the version badge and download links in the README to reflect the new release version 2.7.1, ensuring users have the correct information for downloading the latest builds.

* feat(releases): add beta release system with user opt-in

Implements a complete beta release workflow that allows users to opt-in
to receiving pre-release versions. This enables testing new features
before they're included in stable releases.

Changes:
- Add beta-release.yml workflow for creating beta releases from develop
- Add betaUpdates setting with UI toggle in Settings > Updates
- Add update channel support to electron-updater (beta vs latest)
- Extract shared settings-utils.ts to reduce code duplication
- Add prepare-release.yml workflow for automated release preparation
- Document beta release process in CONTRIBUTING.md and RELEASE.md

Users can enable beta updates in Settings > Updates, and maintainers
can trigger beta releases via the GitHub Actions workflow.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* workflow update

* ci(github): update Discord link and redirect feature requests to discussions

Update Discord invite link to correct URL (QhRnz9m5HE) across all GitHub
templates and workflows. Redirect feature requests from issue template
to GitHub Discussions for better community engagement.

Changes:
- config.yml: Add feature request link to Discussions, fix Discord URL
- question.yml: Update Discord link in pre-question guidance
- welcome.yml: Update Discord link in first-time contributor message

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

.github/ISSUE_TEMPLATE/config.yml

@@ -1,8 +1,8 @@
 blank_issues_enabled: false
 contact_links:
   - name: 💡 Feature Request
-    url: https://github.com/AndyMik90/Auto-Claude/discussions/new?category=ideas
+    url: https://github.com/AndyMik90/Auto-Claude/discussions
     about: Suggest new features in GitHub Discussions
   - name: 💬 Discord Community
-    url: https://discord.gg/KCXaPBr4Dj
+    url: https://discord.gg/QhRnz9m5HE
     about: Questions and discussions - join our Discord!

.github/ISSUE_TEMPLATE/question.yml

@@ -5,7 +5,7 @@ body:
   - type: markdown
     attributes:
       value: |
-        **Before asking:** Check [Discord](https://discord.gg/KCXaPBr4Dj) - your question may already be answered there!
+        **Before asking:** Check [Discord](https://discord.gg/QhRnz9m5HE) - your question may already be answered there!
 
   - type: checkboxes
     id: checklist

.github/workflows/welcome.yml

@@ -18,16 +18,16 @@ jobs:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
           issue-message: |
             👋 Thanks for opening your first issue!
-            
+
             A maintainer will triage this soon. In the meantime:
             - Make sure you've provided all the requested info
-            - Join our [Discord](https://discord.gg/KCXaPBr4Dj) for faster help
+            - Join our [Discord](https://discord.gg/QhRnz9m5HE) for faster help
           pr-message: |
             🎉 Thanks for your first PR!
-            
+
             A maintainer will review it soon. Please make sure:
             - Your branch is synced with `main`
             - CI checks pass
             - You've followed our [contribution guide](CONTRIBUTING.md)
-            
+
             Welcome to the Auto-Claude community!