fix: restore docs deleted in v0.2.3 release, add Paperclip branding

- Restored docs/ directory that was accidentally deleted by `git add -A`
  in the v0.2.3 release script
- Replaced generic "P" favicon with actual paperclip icon using brand
  primary color (#2563EB)
- Added light/dark logo SVGs for Mintlify navbar (paperclip icon + wordmark)
- Updated docs.json with logo configuration for dark/light mode
- Fixed release.sh to stage only release-related files instead of `git add -A`
  to prevent sweeping unrelated changes into release commits

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/release.sh

@@ -191,8 +191,13 @@ fi
 # Remove UI dist bundled into server for publishing
 rm -rf "$REPO_ROOT/server/ui-dist"
 
-# Commit all changes
-git add -A
+# Stage only release-related files (avoid sweeping unrelated changes with -A)
+git add \
+  .changeset/ \
+  '**/CHANGELOG.md' \
+  '**/package.json' \
+  cli/src/index.ts \
+  server/ui-dist
 git commit -m "chore: release v$NEW_VERSION"
 git tag "v$NEW_VERSION"
 echo "  ✓ Committed and tagged v$NEW_VERSION"