Go+ editor plugins

Editor integrations for goonward/goplus:

• zed registers a Go+ language, grammar, queries, and gopls+.
• vscode supplies automatic Go+ tool defaults and syntax scopes to the official Go extension.

Neither plugin writes editor settings or requires semantic-token configuration. Explicit user settings remain available as overrides.

Install Go+ first from goonward/releases, then follow the editor-specific README.

Release artifacts

Plugin releases provide:

• A .vsix for direct Visual Studio Code installation.
• A Zed ZIP to extract and select with Install Dev Extension.
• A combined ZIP containing both plugins and installation instructions.

See INSTALL.md for the exact installation steps.

To publish, update the version in vscode/package.json, zed/extension.toml, and zed/Cargo.toml, then run the Release plugins workflow with the matching vMAJOR.MINOR.PATCH version. The workflow creates the tag and GitHub release only after both plugins build and all three archives pass integrity checks.