feat: merge 2nd round from all rcc/* sessions

- api: tool_use parsing, message_delta, request_id tracking, retry logic
- tools: extended tool suite (WebSearch, WebFetch, Agent, etc.)
- cli: live streamed conversations, session restore, compact commands
- runtime: config loading, system prompt builder, token usage, compaction

rust/crates/tools/Cargo.toml

@@ -5,13 +5,5 @@ edition.workspace = true
 license.workspace = true
 publish.workspace = true
 
-[dependencies]
-regex = "1.12"
-serde = { version = "1.0", features = ["derive"] }
-serde_json = "1.0"
-
-[dev-dependencies]
-tempfile = "3.20"
-
 [lints]
 workspace = true