chore: sync codebase remediation, gameplay systems, and docs

Security & infrastructure:
- Remove unused services/ (auth, spacetimedb) and auth.db
- Add .env.example template, expand .gitignore for env/db files
- Add GitHub Actions CI + commitlint config and workflows
- Add manual vendor chunking and source maps to docs/site vite configs

Shared UI & docs app:
- Add ARIA props and focus-visible rings to Button/Panel
- Add ButtonAsLink primitive; use shared Button in NotFound
- Wire @void-nav/ui into docs app; refresh content pages
- Replace Todo page with Kanban board

Gameplay (Bevy):
- Add ai module (behavior, faction, navigation, perception, spawning, states)
- Add narrative module (events, history, synthesis, ui)
- Refine galaxy contents and in-system flight/scene systems

commitlint.config.js

@@ -0,0 +1,35 @@
+module.exports = {
+  extends: ['@commitlint/config-conventional'],
+  rules: {
+    // Enforce conventional commit types
+    'type-enum': [
+      2,
+      'always',
+      [
+        'feat',     // New feature
+        'fix',      // Bug fix
+        'docs',     // Documentation changes
+        'style',    // Code style changes (formatting, etc.)
+        'refactor', // Code refactoring
+        'perf',     // Performance improvements
+        'test',     // Adding or updating tests
+        'chore',    // Maintenance tasks
+        'revert',   // Revert a previous commit
+        'build',    // Build system changes
+        'ci',       // CI/CD changes
+      ],
+    ],
+    // Scope is optional
+    'scope-empty': [1, 'never'],
+    // Subject must not be empty
+    'subject-empty': [2, 'never'],
+    // Subject must be in sentence case
+    'subject-case': [0],
+    // Subject line length
+    'subject-max-length': [2, 'always', 72],
+    // Body line length
+    'body-max-line-length': [2, 'always', 100],
+    // Footer line length
+    'footer-max-line-length': [2, 'always', 100],
+  },
+};