Replace `objc` with `objc2` in other projects

[madsmtm]

As part of moving towards a (somewhat stable) version, I'd like to submit PRs to other projects to set an ecosystem-wide precedence for using this crate, and to see which patterns people are actually using that objc2 doesn't (or doesn't easily) help with.

Popular reverse-dependencies of objc on crates.io (as of the issue creation date):

• cocoa/cocoa-foundation: Replace objc with objc2 servo/core-foundation-rs#628
• winit: Initial transition to objc2 rust-windowing/winit#2452
• glutin: Move to objc2 rust-windowing/glutin#1461
• core-video-sys: Remove dependency on objc LuoZijun/rust-core-video-sys#23, but unmaintained
• metal: Use objc2 instead of objc gfx-rs/metal-rs#241 / Recommend objc2-metal instead of metal gfx-rs/metal-rs#339
• gfx backends: unmaintained
• wgpu-hal: [metal] Use objc2-metal gfx-rs/wgpu#5641
• clipboard: unmaintained
• arboard: Use objc2 and its framework crates 1Password/arboard#148
• copypasta: Use objc2 and its framework crates alacritty/copypasta#74
• webbrowser: iOS: Use objc2 amodm/webbrowser-rs#87
• locale_config: Use objc2 and objc2-foundation rust-locale/locale_config#11
• rfd: macOS: Use objc2 crates PolyMeilex/rfd#188
• glfw: Use objc2 PistonDevelopers/glfw-rs#566
• wry: Proposal: Use objc2 and its framework crates tauri-apps/wry#1239
• tao: Use objc2 tauri-apps/tao#1049
• offscreen_gl_context: now surfman
• trash: macOS: Use objc2-foundation Byron/trash-rs#107
• skia
• native-dialog: macOS: Use objc2 crates native-dialog-rs/native-dialog-rs#58
• window_clipboard: Use objc2 and its framework crates hecrj/window_clipboard#27
• vulkano: macOS/iOS: Use raw-window-metal to get a CAMetalLayer from raw-window-handle vulkano-rs/vulkano#2561
• miniquad
• surfman: Use objc2-* family of crates servo/surfman#334
• display-link: Likely unmaintained.
• druid-shell: Discontinued.
• dark-light: Use objc2-foundation and objc2-app-kit rust-dark-light/dark-light#37
• btleplug: chore(corebluetooth): Use objc2 and its framework crates deviceplug/btleplug#381
• tts: Use objc2/objc2-avf-audio ndarilek/tts-rs#57
• raw-window-metal: Use objc2 and its framework crates rust-windowing/raw-window-metal#15
• msgbox: archived

Others:

• pathfinder
• webrender
• blurmac: Unmaintained
• alacritty: Use objc2, objc2-foundation and objc2-app-kit alacritty/alacritty#8312
• ruffle: Only used for Safari extension, and for dubious reasons, I'm not gonna touch it.
• veloren: Needs native-dialog and wgpu to migrate
• cacao: Replace objc with objc2? ryanmcgrath/cacao#28
• bluster: Possibly unmaintained.
• clipboard-files
• mac-notification-sys: Version 2 h4llow3En/mac-notification-sys#51 / Updating to objc2 and adding async support h4llow3En/mac-notification-sys#56 / Migrate to objc2 h4llow3En/mac-notification-sys#67
• slint (i-slint-renderer-skia): macOS: Replace use of old apple creates with modern objc2 replacements slint-ui/slint#6940
• fruitbasket: Possibly unmaintained.
• glazier: Archived
• lapce
• neovide: chore: remove legacy objc and cocoa neovide/neovide#2390
• enigo: Move objc dependency to icrate enigo-rs/enigo#250
• nightlight: Possibly unmaintained.
• current_locale
• sys-locale
• zed: Migrate Zed to objc2 zed-industries/zed#22408
• screencapturekit
• eframe: eframe: Use objc2 and its framework crates emilk/egui#4395
• softbuffer: Use objc2 rust-windowing/softbuffer#210
• gpu-allocator: 🤘 metal: Migrate to objc2 architecture with objc2-metal bindings Traverse-Research/gpu-allocator#225
• tray-icon: Rewrite to use objc2 tauri-apps/tray-icon#172
• muda: Migrate from objc/cocoa to objc2 tauri-apps/muda#221
• window-vibrancy: Migrate from objc/cocoa to objc2 tauri-apps/window-vibrancy#150
• global-hotkey: Migrate from objc to objc2 tauri-apps/global-hotkey#99
• tauri: feat: Migrate to objc2 tauri-apps/tauri#10924
• ash-window: ash-window: Update raw-window-metal to v1.0 ash-rs/ash#939
• blade: metal: Migrate from metal-rs to objc2 kvark/blade#229
• rafx
• dioxus
• kanata
• rio
• crossfont: Use objc2 for determining whether font smoothing is enabled alacritty/crossfont#69 and Use more objc2 framework crates alacritty/crossfont#74

Using CoreFoundation:

• core-foundation: Future of this project and discussion about objc2 servo/core-foundation-rs#729
• coreaudio-rs: Use objc2 crates RustAudio/coreaudio-rs#128
• cpal: Update coreaudio-rs RustAudio/cpal#943
• sysinfo: Use objc2-core-foundation GuillaumeGomez/sysinfo#1461
• iana-time-zone: Use objc2-core-foundation strawlab/iana-time-zone#147
• font-kit
• webbrowser: macos: Migrate to objc2-core-foundation amodm/webbrowser-rs#96
• ...

Using SystemConfiguration:

• reqwest
• if-watch
• netdev

Using Security:

• security-framework: Consider using objc2-security? kornelski/rust-security-framework#224
• rustls-platform-verifier
• rustls-native-certs
• native-tls
• cargo-credential-macos-keychain
• keyring
• apple-codesign

Using IOKit:

• serialport
• gilrs

[jinleili]

As soon as metal-rs merges the PR you replaced with objc2, I'm interested in completing the wgpu-hal part

[i509VCB]

Mentioning https://github.com/norse-rs/raw-window-metal since ash-window depends on it.