agent: Disable thinking when using inline assistant/edit file tool (#34141)

This introduces a new field `thinking_allowed` on `LanguageModelRequest`
which lets us control whether thinking should be enabled if the model
supports it.
We permit thinking in the Inline Assistant, Edit File tool and the Git
Commit message generator, this should make generation faster when using
a thinking model, e.g. `claude-sonnet-4-thinking`

Release Notes:

- N/A

crates/language_models/src/provider/cloud.rs

@@ -849,6 +849,7 @@ impl LanguageModel for CloudLanguageModel {
         let use_cloud = cx
             .update(|cx| cx.has_flag::<ZedCloudFeatureFlag>())
             .unwrap_or(false);
+        let thinking_allowed = request.thinking_allowed;
         match self.model.provider {
             zed_llm_client::LanguageModelProvider::Anthropic => {
                 let request = into_anthropic(
@@ -856,7 +857,7 @@ impl LanguageModel for CloudLanguageModel {
                     self.model.id.to_string(),
                     1.0,
                     self.model.max_output_tokens as u64,
-                    if self.model.id.0.ends_with("-thinking") {
+                    if thinking_allowed && self.model.id.0.ends_with("-thinking") {
                         AnthropicModelMode::Thinking {
                             budget_tokens: Some(4_096),
                         }