feat(api): add app-specific directory APIs, closes #5263

[caesar]

I'd appreciate some feedback on the approach taken here as it's my first time working with the Tauri codebase.

In particular, should there be tests? I can't find tests anywhere for similar API features such as the existing appDir method.

Also, are you happy with the way I have refactored appDir and logDir to internally call appConfigDir and appLogDir to avoid duplicated code?

I also wondered if there's an equivalent to @since for the Rust documentation comments?

What kind of change does this PR introduce?

• Bugfix
• Feature
• Docs
• New Binding issue #___
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change?

• Yes, and the changes were approved in issue #___
• No

Checklist

• When resolving issues, they are referenced in the PR's title (e.g fix: remove a typo, closes #___, #___)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.
• I have added a convincing reason for adding this feature, if necessary

Other information

closes #5263

[amrbashir]

In particular, should there be tests? I can't find tests anywhere for similar API features such as the existing appDir method.

It is fine, these functions don't have tests.

Also, are you happy with the way I have refactored appDir and logDir to internally call appConfigDir and appLogDir to avoid duplicated code?

Yeah that's perfect.

I also wondered if there's an equivalent to @since for the Rust documentation comments?

I don't think there is but it is not needed. We are using @since in the js docs because we on

[FabianLars]

Another thing we need to think about is localdata vs data because of windows :/

[amrbashir]

yeah we could also add appLocalDataDir

[caesar]

Thanks for the review @amrbashir, I'll make those changes later. I was actually going to ask about deprecation notices too but forgot, so thanks for mentioning that.

I'll look at appLocalDataDir too.

[caesar]

I think I've addressed all the issues discussed, and also fixed the lint error. Would you mind taking another look @amrbashir ?

[amrbashir]

Also missing change file, should be a minor bump