The program shell wrappers have been renamed from `ya` to `yy`
following the introduction of the new CLI tool named `ya`.
With this in mind, the `shellWrapperName` option has been introduced
to provide users with more flexibility in choosing the name they're
most accustomed to (ra, lf, ...).
Co-authored-by: XYenon <register@xyenon.bid>
Co-authored-by: 三咲雅 · Misaki Masa <sxyazi@gmail.com>
- Always append suffix `.yazi` to plugin's and flavor's attribute names.
- Warn if the attribute names already have the suffix.
- Assert that plugin's and flavor's values point to directories
containing an `init.lua` file.
- Append suffix `.yazi` to symlink targets of yazi plugins, if needed
- Improve some docs, especially links to upstream docs.
- Update tests to make use of this feature.
