refactor: rename llm worker crate to engine

crates/tools/src/grep.rs

@@ -10,7 +10,7 @@ use grep_searcher::{BinaryDetection, Searcher, SearcherBuilder, Sink, SinkContex
 use ignore::WalkBuilder;
 use ignore::overrides::OverrideBuilder;
 use ignore::types::TypesBuilder;
-use llm_worker::tool::{Tool, ToolDefinition, ToolError, ToolMeta, ToolOutput};
+use llm_engine::tool::{Tool, ToolDefinition, ToolError, ToolMeta, ToolOutput};
 use manifest::Scope;
 use serde::Deserialize;
 
@@ -85,7 +85,7 @@ impl Tool for GrepTool {
     async fn execute(
         &self,
         input_json: &str,
-        _ctx: llm_worker::tool::ToolExecutionContext,
+        _ctx: llm_engine::tool::ToolExecutionContext,
     ) -> Result<ToolOutput, ToolError> {
         let params: GrepParams = serde_json::from_str(input_json)
             .map_err(|e| ToolError::InvalidArgument(format!("invalid Grep input: {e}")))?;