Fish automatic integration taken as an example.
Just like fish, Elvish checks `XDG_DATA_DIRS` for its modules.
Thus, Fish integration in zig is reused, and integration in
Elvish now removes `GHOSTTY_FISH_XDG_DIR` environment variable
on launch.
- contains `.elv` file that implements the core of Elvish integration.
- does not contain routines needed for automatic integration.
- stored in `./elvish/lib/...` in preparation for automatic integration:
Elvish imports `.../elvish/lib/*.elv`.
checklist:
- no confirmation on close where the cursor is at prompt:
works, only occasionally doesn't, I'm not yet sure when.
- new terminals start in pwd of previously focused terminal: works
- prompts resize correctly: works
- triple-click while holding `ctrl` selects output of a command:
works (when mouse is over the output)
- cursor at the prompt is turned into a bar: works
- ghostty:`jump_to_prompt` scrolls through prompts: works
- `opt`-click moves cursor at the prompt: works
- `sudo` preserves ghostty terminfo:
untested - not sure when this is needed exactly, but did not encounter
any errors after sudo, either
