v0.5.0

Added

• VS Code-compatible extension packaging and manual publishing support:
  release VSIX generation, VSIX verification, Marketplace/Open VSX publish
  commands, Swift/Dart document activation, and bundled docbridge lsp
  startup from the extension package.

Fixed

• The release publish workflow now restores executable bits on downloaded
  Swift and Dart scanner artifacts before packing the npm tarball, and
  smoke-tests the installed tarball before publishing.

Changed

• Clarified the current editor delivery state in the English and Japanese
  READMEs, including local VSIX installation and the remaining first-publication
  work for VS Code Marketplace and Open VSX.