Add language_models crate to house language model providers (#20945)

This PR adds a new `language_models` crate to house the various language
model providers.

By extracting the provider definitions out of `language_model`, we're
able to remove `language_model`'s dependency on `editor`, which improves
incremental compilation when changing `editor`.

Release Notes:

- N/A

crates/assistant/src/assistant_panel.rs

@@ -50,11 +50,11 @@ use indexed_docs::IndexedDocsStore;
 use language::{
     language_settings::SoftWrap, BufferSnapshot, LanguageRegistry, LspAdapterDelegate, ToOffset,
 };
-use language_model::{
-    provider::cloud::PROVIDER_ID, LanguageModelProvider, LanguageModelProviderId,
-    LanguageModelRegistry, Role,
-};
 use language_model::{LanguageModelImage, LanguageModelToolUse};
+use language_model::{
+    LanguageModelProvider, LanguageModelProviderId, LanguageModelRegistry, Role,
+    ZED_CLOUD_PROVIDER_ID,
+};
 use multi_buffer::MultiBufferRow;
 use picker::{Picker, PickerDelegate};
 use project::lsp_store::LocalLspAdapterDelegate;
@@ -664,7 +664,7 @@ impl AssistantPanel {
         // If we're signed out and don't have a provider configured, or we're signed-out AND Zed.dev is
         // the provider, we want to show a nudge to sign in.
         let show_zed_ai_notice = client_status.is_signed_out()
-            && active_provider.map_or(true, |provider| provider.id().0 == PROVIDER_ID);
+            && active_provider.map_or(true, |provider| provider.id().0 == ZED_CLOUD_PROVIDER_ID);
 
         self.show_zed_ai_notice = show_zed_ai_notice;
         cx.notify();

crates/assistant/src/assistant_settings.rs

@@ -5,13 +5,12 @@ use anthropic::Model as AnthropicModel;
 use feature_flags::FeatureFlagAppExt;
 use fs::Fs;
 use gpui::{AppContext, Pixels};
-use language_model::provider::open_ai;
-use language_model::settings::{
-    AnthropicSettingsContent, AnthropicSettingsContentV1, OllamaSettingsContent,
-    OpenAiSettingsContent, OpenAiSettingsContentV1, VersionedAnthropicSettingsContent,
-    VersionedOpenAiSettingsContent,
+use language_model::{CloudModel, LanguageModel};
+use language_models::{
+    provider::open_ai, AllLanguageModelSettings, AnthropicSettingsContent,
+    AnthropicSettingsContentV1, OllamaSettingsContent, OpenAiSettingsContent,
+    OpenAiSettingsContentV1, VersionedAnthropicSettingsContent, VersionedOpenAiSettingsContent,
 };
-use language_model::{settings::AllLanguageModelSettings, CloudModel, LanguageModel};
 use ollama::Model as OllamaModel;
 use schemars::{schema::Schema, JsonSchema};
 use serde::{Deserialize, Serialize};

crates/assistant/src/context.rs

@@ -25,13 +25,15 @@ use gpui::{
 
 use language::{AnchorRangeExt, Bias, Buffer, LanguageRegistry, OffsetRangeExt, Point, ToOffset};
 use language_model::{
-    logging::report_assistant_event,
-    provider::cloud::{MaxMonthlySpendReachedError, PaymentRequiredError},
     LanguageModel, LanguageModelCacheConfiguration, LanguageModelCompletionEvent,
     LanguageModelImage, LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage,
     LanguageModelRequestTool, LanguageModelToolResult, LanguageModelToolUse, MessageContent, Role,
     StopReason,
 };
+use language_models::{
+    provider::cloud::{MaxMonthlySpendReachedError, PaymentRequiredError},
+    report_assistant_event,
+};
 use open_ai::Model as OpenAiModel;
 use paths::contexts_dir;
 use project::Project;

crates/assistant/src/inline_assistant.rs

@@ -30,9 +30,10 @@ use gpui::{
 };
 use language::{Buffer, IndentKind, Point, Selection, TransactionId};
 use language_model::{
-    logging::report_assistant_event, LanguageModel, LanguageModelRegistry, LanguageModelRequest,
-    LanguageModelRequestMessage, LanguageModelTextStream, Role,
+    LanguageModel, LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage,
+    LanguageModelTextStream, Role,
 };
+use language_models::report_assistant_event;
 use multi_buffer::MultiBufferRow;
 use parking_lot::Mutex;
 use project::{CodeAction, ProjectTransaction};

crates/assistant/src/terminal_inline_assistant.rs

@@ -17,9 +17,9 @@ use gpui::{
 };
 use language::Buffer;
 use language_model::{
-    logging::report_assistant_event, LanguageModelRegistry, LanguageModelRequest,
-    LanguageModelRequestMessage, Role,
+    LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage, Role,
 };
+use language_models::report_assistant_event;
 use settings::Settings;
 use std::{
     cmp,