feat: Add Bun language analyzer and related functionality

- Implemented BunPackageNormalizer to deduplicate packages by name and version.
- Created BunProjectDiscoverer to identify Bun project roots in the filesystem.
- Added project files for the Bun analyzer including manifest and project configuration.
- Developed comprehensive tests for Bun language analyzer covering various scenarios.
- Included fixture files for testing standard installs, isolated linker installs, lockfile-only scenarios, and workspaces.
- Established stubs for authentication sessions to facilitate testing in the web application.

.claude/settings.local.json

@@ -9,7 +9,10 @@
       "Bash(grep:*)",
       "Bash(dotnet build:*)",
       "Bash(cat:*)",
-      "Bash(copy:*)"
+      "Bash(copy:*)",
+      "Bash(dotnet test:*)",
+      "Bash(dir:*)",
+      "Bash(Select-Object -ExpandProperty FullName)"
     ],
     "deny": [],
     "ask": []