Use livekit's Rust SDK instead of their swift SDK (#13343)

See https://github.com/livekit/rust-sdks/pull/355

Todo:

* [x] make `call` / `live_kit_client` crates use the livekit rust sdk
* [x] create a fake version of livekit rust API for integration tests
* [x] capture local audio
* [x] play remote audio
* [x] capture local video tracks
* [x] play remote video tracks
* [x] tests passing
* bugs
* [x] deafening does not work
(https://github.com/livekit/rust-sdks/issues/359)
* [x] mute and speaking status are not replicated properly:
(https://github.com/livekit/rust-sdks/issues/358)
* [x] **linux** - crash due to symbol conflict between WebRTC's
BoringSSL and libcurl's openssl
(https://github.com/livekit/rust-sdks/issues/89)
* [x] **linux** - libwebrtc-sys adds undesired dependencies on `libGL`
and `libXext`
* [x] **windows** - linker error, maybe related to the C++ stdlib
(https://github.com/livekit/rust-sdks/issues/364)
        ```
libwebrtc_sys-54978c6ad5066a35.rlib(video_frame.obj) : error LNK2038:
mismatch detected for 'RuntimeLibrary': value 'MT_StaticRelease' doesn't
match value 'MD_DynamicRelease' in
libtree_sitter_yaml-df6b0adf8f009e8f.rlib(2e40c9e35e9506f4-scanner.o)
        ```
    * [x] audio problems

Release Notes:

- Switch from Swift to Rust LiveKit SDK 🦀

---------

Co-authored-by: Mikayla Maki <mikayla@zed.dev>
Co-authored-by: Conrad Irwin <conrad@zed.dev>
Co-authored-by: Kirill Bulatov <kirill@zed.dev>
Co-authored-by: Michael Sloan <michael@zed.dev>

crates/gpui/src/platform/mac/platform.rs

@@ -1,14 +1,14 @@
 use super::{
     attributed_string::{NSAttributedString, NSMutableAttributedString},
     events::key_to_native,
-    BoolExt,
+    renderer, screen_capture, BoolExt,
 };
 use crate::{
     hash, Action, AnyWindowHandle, BackgroundExecutor, ClipboardEntry, ClipboardItem,
     ClipboardString, CursorStyle, ForegroundExecutor, Image, ImageFormat, Keymap, MacDispatcher,
     MacDisplay, MacWindow, Menu, MenuItem, PathPromptOptions, Platform, PlatformDisplay,
-    PlatformTextSystem, PlatformWindow, Result, SemanticVersion, Task, WindowAppearance,
-    WindowParams,
+    PlatformTextSystem, PlatformWindow, Result, ScreenCaptureSource, SemanticVersion, Task,
+    WindowAppearance, WindowParams,
 };
 use anyhow::anyhow;
 use block::ConcreteBlock;
@@ -58,8 +58,6 @@ use std::{
 };
 use strum::IntoEnumIterator;
 
-use super::renderer;
-
 #[allow(non_upper_case_globals)]
 const NSUTF8StringEncoding: NSUInteger = 4;
 
@@ -550,6 +548,12 @@ impl Platform for MacPlatform {
             .collect()
     }
 
+    fn screen_capture_sources(
+        &self,
+    ) -> oneshot::Receiver<Result<Vec<Box<dyn ScreenCaptureSource>>>> {
+        screen_capture::get_sources()
+    }
+
     fn active_window(&self) -> Option<AnyWindowHandle> {
         MacWindow::active_window()
     }