[bug] fileAssociations missing `LSHandlerRank` on macOS

[tjramage]

Describe the bug

When using the bundle.fileAssociations setting in the Tauri configuration, a CFBundleDocumentTypes key is created in the bundled Info.plist. However, this is missing the LSHandlerRank and Apple warns after uploading to App Store Connect:

ITMS-90788: Incomplete Document Type Configuration

The CFBundleDocumentTypes dictionary array in the '<com.example.myapp>' Info.plist should contain an LSHandlerRank value for the CFBundleTypeName '' entry. Refer to https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html#//apple_ref/doc/uid/TP40009249-SW1 for more information on the LSHandlerRank key.

Reproduction

Set bundle.fileAssociations in your Tauri config, e.g:

"fileAssociations": [{
  "name": "Email Message",
  "ext": ["eml"],
  "mimeType": "message/rfc822",
  "role": "Viewer"
}]

The related section in Info.plist is created as the following:

<key>CFBundleDocumentTypes</key>
<array>
	<dict>
		<key>CFBundleTypeExtensions</key>
		<array>
			<string>eml</string>
		</array>
		<key>CFBundleTypeName</key>
		<string>Email Message</string>
		<key>CFBundleTypeRole</key>
		<string>Viewer</string>
	</dict>
</array>

Expected behavior

The required Launch Service Handler Rank key should also be included:

<key>LSHandlerRank</key>
<string>Alternate</string>

The option to set Owner | Default | Alternate | None should be configurable in the FileAssociation type, as per Apple's docs: https://developer.apple.com/documentation/bundleresources/information-property-list/cfbundledocumenttypes/lshandlerrank

Full tauri info output

[✔] Environment
    - OS: Mac OS 14.4.1 arm64 (X64)
    ✔ Xcode Command Line Tools: installed
    ✔ rustc: 1.85.1 (4eb161250 2025-03-15)
    ✔ cargo: 1.85.1 (d73d2caf9 2024-12-31)
    ✔ rustup: 1.28.1 (f9edccde0 2025-03-05)
    ✔ Rust toolchain: stable-aarch64-apple-darwin (default)
    - node: 20.8.0
    - yarn: 1.22.19
    - npm: 10.1.0
    - bun: 1.2.2

[-] Packages
    - tauri 🦀: 2.4.0, (outdated, latest: 2.4.1)
    - tauri-build 🦀: 2.1.0, (outdated, latest: 2.1.1)
    - wry 🦀: 0.50.5
    - tao 🦀: 0.32.8
    - @tauri-apps/api : 2.4.1
    - @tauri-apps/cli : 2.4.1

[-] Plugins
    - tauri-plugin-window-state 🦀: 2.2.1, (outdated, latest: 2.2.2)
    - @tauri-apps/plugin-window-state : 2.2.2
    - tauri-plugin-shell 🦀: 2.2.0, (outdated, latest: 2.2.1)
    - @tauri-apps/plugin-shell : 2.2.1
    - tauri-plugin-http 🦀: 2.4.2, (outdated, latest: 2.4.3)
    - @tauri-apps/plugin-http : 2.4.3
    - tauri-plugin-opener 🦀: 2.2.6
    - @tauri-apps/plugin-opener : 2.2.6
    - tauri-plugin-clipboard-manager 🦀: 2.2.2
    - @tauri-apps/plugin-clipboard-manager : 2.2.2
    - tauri-plugin-fs 🦀: 2.2.0, (outdated, latest: 2.2.1)
    - @tauri-apps/plugin-fs : 2.2.1
    - tauri-plugin-dialog 🦀: 2.2.0, (outdated, latest: 2.2.1)
    - @tauri-apps/plugin-dialog : 2.2.1
    - tauri-plugin-store 🦀: 2.2.0
    - @tauri-apps/plugin-store : 2.2.0

[-] App
    - build-type: bundle
    - CSP: style-src 'unsafe-inline' 'self'; connect-src ipc: http://ipc.localhost; font-src https://fonts.gstatic.com; img-src * blob: data: asset: http://asset.localhost; default-src 'self' ipc: http://ipc.localhost asset:
    - frontendDist: ../dist
    - devUrl: http://localhost:1420/
    - framework: React
    - bundler: Vite

Stack trace

Additional context

No response