docs: establish PicadoLabs open-source governance, CI workflows, and contributor guidelines

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Create a report to help us improve Model Router
+title: "[BUG] "
+labels: bug
+assignees: ''
+---
+
+## Description
+A clear and concise description of what the bug is.
+
+## Environment
+- OS: [e.g. Ubuntu 22.04, macOS 14.2, Windows 11]
+- Python Version: [e.g. 3.11.8]
+- Node.js Version: [e.g. 20.11.0]
+- Router Mode: [e.g. rules, llm]
+- Provider: [e.g. mock, ollama, openai]
+
+## Steps to Reproduce
+1. Start server with `...`
+2. Send request to `...`
+3. See error
+
+## Expected Behavior
+A clear description of what you expected to happen.
+
+## Actual Behavior
+A clear description of what actually happened.
+
+## Logs / Screenshots
+If applicable, add console output or screenshots to help explain your problem.
+
+## Additional Context
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+about: Suggest an idea or capability for Model Router
+title: "[FEATURE] "
+labels: enhancement
+assignees: ''
+---
+
+## Problem / Use Case
+Is your feature request related to a problem or specific use case? Please describe.
+
+## Proposed Solution
+A clear and concise description of what you want to happen.
+
+## Alternatives Considered
+A clear and concise description of any alternative solutions or features you've considered.
+
+## Additional Context
+Add any other context or screenshots about the feature request here.

.github/pull_request_template.md

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+## Summary
+Provide a brief summary of the changes introduced in this pull request.
+
+## Motivation
+Explain why this change is necessary and what issue it resolves.
+
+## Changes Made
+- List key changes and additions.
+- Reference modified files and modules.
+
+## Testing Performed
+- [ ] Backend tests passing (`pytest backend/tests`)
+- [ ] Frontend build passing (`cd frontend && npm run build`)
+- [ ] Manual verification in Control Room or Typer CLI
+
+## Breaking Changes
+- [ ] Yes (explain below)
+- [ ] No
+
+## Checklist
+- [ ] My code follows the style guidelines of this project
+- [ ] I have performed a self-review of my own code
+- [ ] I have added tests that prove my fix or feature works
+- [ ] I have updated the documentation accordingly

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  backend-test:
+    name: Backend Tests (Python ${{ matrix.python-version }})
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.10", "3.11", "3.12"]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: 'pip'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+
+      - name: Run Pytest suite
+        run: |
+          pytest backend/tests -v
+
+  frontend-build:
+    name: Frontend Build & Typecheck
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js 20
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'npm'
+          cache-dependency-path: frontend/package.json
+
+      - name: Install frontend dependencies
+        working-directory: frontend
+        run: npm ci
+
+      - name: Build and typecheck frontend
+        working-directory: frontend
+        run: npm run build