feat(mcp): add LLM server crate and remote client integration

- Introduce `owlen-mcp-llm-server` crate with RPC handling, `generate_text` tool, model listing, and streaming notifications.
- Add `RpcNotification` struct and `MODELS_LIST` method to the MCP protocol.
- Update `owlen-core` to depend on `tokio-stream`.
- Adjust Ollama provider to omit empty `tools` field for compatibility.
- Enhance `RemoteMcpClient` to locate the renamed server binary, handle resource tools locally, and implement the `Provider` trait (model listing, chat, streaming, health check).
- Add new crate to workspace `Cargo.toml`.

crates/owlen-core/Cargo.toml

@@ -41,6 +41,7 @@ duckduckgo = "0.2.0"
 reqwest = { workspace = true, features = ["default"] }
 reqwest_011 = { version = "0.11", package = "reqwest" }
 path-clean = "1.0"
+tokio-stream = "0.1"
 
 [dev-dependencies]
 tokio-test = { workspace = true }