chore: add GitHub workflows, issue templates, and changelog

- Tests, Pint, Release, Changelog, Auto-merge, Deploy Docs workflows
- Bug report template, security policy, contributing guide
- Dependabot config for GitHub Actions
- Remove .idea from tracking
- Keep only premium packages in ecosystem section

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,11 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Ask a question
+    url: https://github.com/Relaticle/comments/discussions/new?category=q-a
+    about: Ask the community for help
+  - name: Request a feature
+    url: https://github.com/Relaticle/comments/discussions/new?category=ideas
+    about: Share ideas for new features
+  - name: Report a security issue
+    url: https://github.com/Relaticle/comments/security/policy
+    about: Learn how to notify us for sensitive bugs