bundles.json lacks integrity validation, can reference missing plugins

[StencilwashCoder]

The bundles.json file references plugin bundles that group related skills together. However, there's no test or validation that all plugins listed in a bundle actually exist in the plugins/ directory or that their dependencies are satisfied.

If a plugin in a bundle is removed or renamed, the bundle becomes broken but this isn't detected until a user tries to install it.

A CI check that validates bundle integrity would catch:

• Missing plugins referenced in bundles
• Version mismatches between bundle requirements and actual plugin versions
• Circular dependencies between bundles
• Bundles referencing plugins that have been removed or renamed