Extension refactor (#20305)

This contains the main changes to the extensions crate from #20049. The
primary goal here is removing dependencies that we can't include on the
remote.


Release Notes:

- N/A

---------

Co-authored-by: Mikayla <mikayla@zed.dev>
Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>
Co-authored-by: Marshall <marshall@zed.dev>

crates/zed/Cargo.toml

@@ -15,6 +15,7 @@ name = "zed"
 path = "src/main.rs"
 
 [dependencies]
+assistant_slash_command.workspace = true
 activity_indicator.workspace = true
 anyhow.workspace = true
 assets.workspace = true
@@ -53,6 +54,7 @@ go_to_line.workspace = true
 gpui = { workspace = true, features = ["wayland", "x11", "font-kit"] }
 http_client.workspace = true
 image_viewer.workspace = true
+indexed_docs.workspace = true
 inline_completion_button.workspace = true
 install_cli.workspace = true
 journal.workspace = true

crates/zed/src/main.rs

@@ -7,6 +7,7 @@ mod reliability;
 mod zed;
 
 use anyhow::{anyhow, Context as _, Result};
+use assistant_slash_command::SlashCommandRegistry;
 use chrono::Offset;
 use clap::{command, Parser};
 use cli::FORCE_CLI_MODE_ENV_VAR_NAME;
@@ -23,6 +24,7 @@ use gpui::{
     VisualContext,
 };
 use http_client::{read_proxy_from_env, Uri};
+use indexed_docs::IndexedDocsRegistry;
 use language::LanguageRegistry;
 use log::LevelFilter;
 use reqwest_client::ReqwestClient;
@@ -39,6 +41,7 @@ use settings::{
 };
 use simplelog::ConfigBuilder;
 use smol::process::Command;
+use snippet_provider::SnippetRegistry;
 use std::{
     env,
     fs::OpenOptions,
@@ -402,12 +405,19 @@ fn main() {
             app_state.client.telemetry().clone(),
             cx,
         );
+        let api = extensions_ui::ConcreteExtensionRegistrationHooks::new(
+            ThemeRegistry::global(cx),
+            SlashCommandRegistry::global(cx),
+            IndexedDocsRegistry::global(cx),
+            SnippetRegistry::global(cx),
+            app_state.languages.clone(),
+            cx,
+        );
         extension_host::init(
+            api,
             app_state.fs.clone(),
             app_state.client.clone(),
             app_state.node_runtime.clone(),
-            app_state.languages.clone(),
-            ThemeRegistry::global(cx),
             cx,
         );
         recent_projects::init(cx);

crates/zed/src/reliability.rs

@@ -495,10 +495,7 @@ async fn upload_panic(
 ) -> Result<bool> {
     *most_recent_panic = Some((panic.panicked_on, panic.payload.clone()));
 
-    let json_bytes = serde_json::to_vec(&PanicRequest {
-        panic: panic.clone(),
-    })
-    .unwrap();
+    let json_bytes = serde_json::to_vec(&PanicRequest { panic }).unwrap();
 
     let Some(checksum) = client::telemetry::calculate_json_checksum(&json_bytes) else {
         return Ok(false);