Add machi-bot subproject: multi-channel AI assistant framework supporting Telegram and CLI interaction

- Add machi-bot and machi-wasm as workspace members in root Cargo.toml, update workspace dependencies configuration
- Create machi-bot/Cargo.toml: define package metadata, feature flags (telegram), dependencies (teloxide, clap, dirs-next, and others)
- Implement core modules:
  - agent/context.rs: message context builder supporting system prompt, conversation history, tool calls
  - agent/loop_runner.rs: async message processing engine with session integration

Author: gitctrlx

.github/workflows/rust-publish.yml

@@ -12,6 +12,6 @@ jobs:
   call-publish:
     uses: qntx/workflows/.github/workflows/rust-publish.yml@main
     with:
-      package: "machi-derive machi machi-cli"
+      package: "machi-derive machi machi-bot machi-wasm"
     secrets:
       CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}

.gitignore

@@ -22,4 +22,5 @@ target
 
 /kobe
 /rig
-/smolagents
+/smolagents
+/nanobot