chore: release v0.5.0

[jo16oh]

Breaking changes

• cvk.json(c) now rejects unknown fields. Remove or rename them:

  {
    "$schema": "./node_modules/css-var-kit/cvk.schema.json", // still allowed
    "excludeFiles": ["dist/**"], // error: unknown field `excludeFiles`
    "include": ["!dist/**"],     // use this instead
  }

• VS Code: cvk.excludeFiles is removed. Use cvk.include with ! patterns.

• VS Code: invalid settings sent as initializationOptions now show an error and disable diagnostics when no cvk.json(c) exists. Before, the server ignored them.

Deprecations

• VS Code: cvk.lookupFiles is deprecated. Use cvk.definitionFiles.