docs: sync repo docs and fix ttyd path

[pkking]

Summary

• Fix the ttyd external install path so the downloaded binary lands at the intended name.
• Refresh repository docs to match the current dotfiles/ layout and metadata.
• Mark the old rofi/i3 plan as abandoned and add a small repair checklist for the completed cleanup.

Validation

• bash scripts/check-doc-entrypoints.sh
• python3 scripts/check-doc-commands.py
• git diff --check

[gemini-code-assist]

Code Review

This pull request updates project documentation and fixes a path configuration in .chezmoiexternal.toml.tmpl. Specifically, it marks the Rofi configuration design as abandoned, adds a repair checklist document, updates metadata in AGENTS.md, and corrects the ttyd external installation path. Feedback on the changes points out that the path attribute in .chezmoiexternal.toml.tmpl is ignored for type = "file" and should be removed entirely to avoid confusion.

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[gemini-code-assist]

In chezmoi's .chezmoiexternal configuration, the path attribute is only supported and used for archive and archive-file types (to specify which file(s) to extract from the archive). For type = "file", the path attribute is ignored because the downloaded file is always saved directly to the target path specified in the section header (in this case, .local/bin/ttyd). Since path = "ttyd" is redundant and has no effect, it should be removed to avoid confusion.

    executable = true