feat(cli,core): add local interactive shell (conn shell), Ctrl+Space passthrough and bump to v6.1.0

- Add `conn shell` CLI subcommand for spawning local interactive shells with AI Copilot support.

- Implement `protocol="local"` on core `node` class with PTY process spawning, dynamic PWD tracking (/proc/PID/cwd + OSC 7), and AI metadata mapping.

- Implement `_is_child_connpy_active()` to inspect PTY slave foreground process group (tcgetpgrp + /proc/PGID/cmdline).

- Automatically pass `Ctrl+Space` (b'\x00') down to child foreground `conn` / `connpy` processes when running nested sessions in local shell.

- Add `--shell-command`, `--shell-prompt`, and `--shell-os` configuration options to `conn config`.

- Update `README.md` and `connpy/__init__.py` documentation to include `conn shell` and PAT API Token management.

- Add comprehensive unit tests in `test_local_shell.py` and `test_completion.py`.

- Bump version to v6.1.0 and regenerate full HTML documentation in `docs/` via pdoc.

README.md

@@ -3,7 +3,7 @@
 </p>
 
 
-# Connpy (v6.0.3)
+# Connpy (v6.1.0)
 [![](https://img.shields.io/pypi/v/connpy.svg?style=flat-square)](https://pypi.org/pypi/connpy/)
 [![](https://img.shields.io/pypi/pyversions/connpy.svg?style=flat-square)](https://pypi.org/pypi/connpy/)
 [![](https://img.shields.io/pypi/dm/connpy.svg?style=flat-square&cacheSeconds=86400)](https://pypi.org/pypi/connpy/)
@@ -44,6 +44,21 @@ Connect to external data sources and tools dynamically via the Model Context Pro
 conn ai --mcp
 ```
 
+### 1d. Local Interactive Shell (conn shell)
+Launch a local interactive shell with AI Copilot support enabled directly on your host machine:
+```bash
+conn shell                     # Start local shell (default: $SHELL or /bin/bash)
+conn shell -c /bin/zsh         # Override shell executable
+conn shell --capture session.log # Log session output to file
+```
+* **Nested Sessions & Passthrough**: Supports running nested `conn` / `connpy` connections inside `conn shell`. Automatically detects foreground `conn` processes and forwards `Ctrl+Space` down to the active device connection instead of triggering the local Copilot.
+* **Shell Configuration**: Configure default shell command, prompt regex, or OS type via `conn config`:
+```bash
+conn config --shell-command /bin/zsh
+conn config --shell-prompt "\$\s*$"
+conn config --shell-os ubuntu
+```
+
 
 ---
 
@@ -179,14 +194,19 @@ conn config --service-mode remote
 conn config --remote localhost:50051
 ```
 
-### 8c. User Management
-Manage server-side user credentials for distributed setups:
+### 8c. User Management & API Tokens
+Manage server-side user credentials and Personal Access Tokens (PAT) for automated setups:
 ```bash
 conn user --add username
 conn user --list
 conn user --regen-password username
+
+# Personal Access Tokens (PAT) for non-interactive API access
+conn user --create-token "CI/CD Token" --expires-in 30
+conn user --list-tokens
+conn user --revoke-token <token_id>
 ```
-Use `--path` to specify custom configuration folders in server Mode B.
+Use `--path` to specify custom configuration folders in server Mode B. Pass API tokens via `CONNPY_TOKEN` environment variable.
 
 ### 8d. SSO / OIDC
 Configure identity providers (e.g. Authelia, Keycloak) for SSO gRPC authentication using the interactive wizard: