chore: GitHub workflow revamp — GitHub Flow, community files, CI updates (#101)

* chore: add comprehensive .gitignore

* ci: update CI workflow for GitHub Flow

- Change triggers from develop to main (PRs to main + pushes to main)
- Add concurrency controls to cancel stale runs
- Update docker/build-push-action to v6
- Add descriptive job names for branch protection status checks
- Update screenshot refresh and docs sync to trigger on main pushes

* ci: update docker-publish for GitHub Flow

- Remove develop branch trigger (no more dev tag)
- Keep v* tag trigger for releases
- Update docker/build-push-action to v6

* docs: add community and governance files

- CONTRIBUTING.md with dev setup and PR guidelines
- SECURITY.md with vulnerability reporting policy
- CODE_OF_CONDUCT.md (Contributor Covenant v2.1 reference)
- PR template with conventional commits checklist
- Issue templates for bug reports and feature requests
- CODEOWNERS defaulting to @AnsoCode
- Dependabot config for npm (root, backend, frontend) and GitHub Actions

* docs: add README with badges, quick start, and contributing section

* chore: add LICENSE placeholder and open license decision issue (#100)

* docs: update CLAUDE.md for GitHub Flow branching model

- Replace develop-based Git Flow with GitHub Flow (main only)
- All branches now created off main, PRs target main
- Simplify release checklist (no develop-to-main merge step)
- Update testing strategy to reference Vitest and Playwright
- Fix docs.json reference (was mint.json)

* chore: track CLAUDE.md in version control

Remove CLAUDE.md from .gitignore so project workflow instructions
are versioned alongside the code they govern.

* docs: add MANUAL_STEPS.md for GitHub settings that require UI configuration

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,56 @@
+name: Bug Report
+description: Report a bug in Sencho
+labels: ["bug"]
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Describe the bug
+      placeholder: A clear description of the bug
+    validations:
+      required: true
+  - type: textarea
+    id: reproduce
+    attributes:
+      label: Steps to reproduce
+      placeholder: |
+        1. Go to '...'
+        2. Click on '...'
+        3. See error
+    validations:
+      required: true
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behavior
+    validations:
+      required: true
+  - type: input
+    id: version
+    attributes:
+      label: Sencho version
+      placeholder: "0.2.2"
+    validations:
+      required: true
+  - type: dropdown
+    id: deployment
+    attributes:
+      label: Deployment method
+      options:
+        - Docker Compose
+        - Docker run
+        - Development (npm run dev)
+        - Other
+    validations:
+      required: true
+  - type: input
+    id: browser
+    attributes:
+      label: Browser (if UI issue)
+      placeholder: "Chrome 120, Firefox 121, etc."
+  - type: textarea
+    id: logs
+    attributes:
+      label: Relevant logs
+      description: Paste any relevant container or browser console logs
+      render: shell

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,40 @@
+name: Feature Request
+description: Suggest a new feature for Sencho
+labels: ["enhancement"]
+body:
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem or motivation
+      description: What problem does this feature solve? Why do you need it?
+      placeholder: I'm always frustrated when...
+    validations:
+      required: true
+  - type: textarea
+    id: solution
+    attributes:
+      label: Proposed solution
+      description: Describe the feature you'd like to see
+    validations:
+      required: true
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives considered
+      description: Any workarounds or alternative approaches you've considered
+  - type: dropdown
+    id: scope
+    attributes:
+      label: Feature scope
+      options:
+        - Dashboard / UI
+        - Stack management
+        - Multi-node / remote nodes
+        - App Store
+        - Observability / Logs
+        - Settings / Configuration
+        - Docker / Infrastructure
+        - API
+        - Other
+    validations:
+      required: true