Remove dependents of language_models (#25511)

This PR removes the dependents of the `language_models` crate.

The following types have been moved from `language_models` to
`language_model` to facilitate this:

- `LlmApiToken`
- `RefreshLlmTokenListener`
- `MaxMonthlySpendReachedError`
- `PaymentRequiredError`

With this change only `zed` now depends on `language_models`.

Release Notes:

- N/A

crates/assistant_context_editor/Cargo.toml

@@ -30,7 +30,6 @@ indexed_docs.workspace = true
 language.workspace = true
 language_model.workspace = true
 language_model_selector.workspace = true
-language_models.workspace = true
 log.workspace = true
 multi_buffer.workspace = true
 open_ai.workspace = true

crates/assistant_context_editor/src/context.rs

@@ -21,9 +21,9 @@ use language::{AnchorRangeExt, Bias, Buffer, LanguageRegistry, OffsetRangeExt, P
 use language_model::{
     report_assistant_event, LanguageModel, LanguageModelCacheConfiguration,
     LanguageModelCompletionEvent, LanguageModelImage, LanguageModelRegistry, LanguageModelRequest,
-    LanguageModelRequestMessage, LanguageModelToolUseId, MessageContent, Role, StopReason,
+    LanguageModelRequestMessage, LanguageModelToolUseId, MaxMonthlySpendReachedError,
+    MessageContent, PaymentRequiredError, Role, StopReason,
 };
-use language_models::provider::cloud::{MaxMonthlySpendReachedError, PaymentRequiredError};
 use open_ai::Model as OpenAiModel;
 use paths::contexts_dir;
 use project::Project;