Fix apply not working for relative paths

[mmorella-dev]

This PR fixes a bug where trying to use apply with a relative path to a directory of YAML files causes a panic:

 macos-defaults apply data/macos-defaults/
Error:
   0: Failed to read bytes from path data/macos-defaults/data/macos-defaults/accessibility.yaml.
   1: No such file or directory (os error 2)

Location:
   src/main.rs:93

Backtrace omitted. Run with RUST_BACKTRACE=1 environment variable to display it.
Run with RUST_BACKTRACE=full to include source snippets.

The issue is caused here:

macos-defaults/src/cmd/apply.rs

Lines 158 to 163 in 7ec24bc

	let mut files = path
	.read_dir_utf8()?
	.filter_map(Result::ok)
	.filter(|entry| entry.path().extension().map_or(false, |ext| ext == "yml" || ext == "yaml"))
	.map(|entry| path.join(entry.path()))
	.collect::<Vec<Utf8PathBuf>>();

Calling entry.path() gets a complete path to each entry (e.g. data/macos-defaults/accessibility.yaml), which is then erroneously joined to the path of its parent directory (data/macos-defaults/), resulting in a non-existent path like data/macos-defaults/data/macos-defaults/accessibility.yaml. This incidentally works when the path is absolute, because in that case the new path simply replaces the old one).

This PR changes the implementation to avoid improperly appending the string, and function as intended.

macos-defaults apply data/macos-defaults/
  ▶ Accessibility
  ▶ Activity Monitor
  ▶ Audio & Sound
  ▶ Calendar
  ▶ Contacts
  ▶ Displays
  ▶ Dock
  ▶ Finder
  ▶ Globals
  ▶ Keyboard
  ▶ Mac App Store
  ▶ Mail
  ▶ Menu Bar
  ▶ Messages
  ▶ Photos & Image Capture
  ▶ Safari
  ▶ Security
  ▶ Siri
  ▶ Spotlight
  ▶ Terminal
  ▶ Text Edit
  ▶ Time Machine
  ▶ Trackpad
  ▶ Trackpad Currenthost
  ▶ Xcode

[mmorella-dev]

Also wanted to say, I discovered this tool today and it looks very promising! Thank you for maintaining it.

[dsully]

Thanks for the PR!