Add LM Studio support to the Assistant (#23097)

#### Release Notes:

- Added support for [LM Studio](https://lmstudio.ai/) to the Assistant.

#### Quick demo:


https://github.com/user-attachments/assets/af58fc13-1abc-4898-9747-3511016da86a

#### Future enhancements:
- wire up tool calling (new in [LM Studio
0.3.6](https://lmstudio.ai/blog/lmstudio-v0.3.6))

---------

Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>

Cargo.toml

@@ -69,6 +69,7 @@ members = [
     "crates/livekit_client",
     "crates/livekit_client_macos",
     "crates/livekit_server",
+    "crates/lmstudio",
     "crates/lsp",
     "crates/markdown",
     "crates/markdown_preview",
@@ -255,6 +256,7 @@ languages = { path = "crates/languages" }
 livekit_client = { path = "crates/livekit_client" }
 livekit_client_macos = { path = "crates/livekit_client_macos" }
 livekit_server = { path = "crates/livekit_server" }
+lmstudio = { path = "crates/lmstudio" }
 lsp = { path = "crates/lsp" }
 markdown = { path = "crates/markdown" }
 markdown_preview = { path = "crates/markdown_preview" }
@@ -614,6 +616,7 @@ image_viewer = { codegen-units = 1 }
 inline_completion_button = { codegen-units = 1 }
 install_cli = { codegen-units = 1 }
 journal = { codegen-units = 1 }
+lmstudio = { codegen-units = 1 }
 menu = { codegen-units = 1 }
 notifications = { codegen-units = 1 }
 ollama = { codegen-units = 1 }