* Create go_prompt_info to add go version to prompts
* golang: move go_prompt_info to plugin, guard and quote output
Addresses review feedback: the prompt helper only belongs to Go
developers, so it moves out of lib/ (sourced for every shell) into
plugins/golang/golang.plugin.zsh. Adds a $+commands[go] guard so
users without Go installed don't spawn a process or see a stderr
error on every prompt render, quotes the version output the same
way the rvm/nvm helpers do so a % can't be read as a prompt escape,
and adds the dummy go_prompt_info stub to
lib/prompt_info_functions.zsh for themes that call it when the
plugin isn't loaded.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0193G8TyNqmNnv6v9HsVafGa
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Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
Per the [`go` command specification](https://golang.org/cmd/go/#hdr-Package_lists),
the `...` wildcard matches the empty string. This makes commands like
`go <action> . ./...` unnecessary: they should use `go <action> ./...`.
This also fixes a bug with the `gofa` shortcut, where it would emit an
error if called from a directory containing no go source files (but
having subdirectories that _did_ contain go files).