This pull request introduces a new `test-conn` command-line tool for
testing SSH connection flows and user input handling, along with
improvements to user input provider extensibility and several
configuration and validation enhancements.
* New `test-conn` CLI Tool
* User Input Provider Abstraction
* Refactored user input handling to use a pluggable `UserInputProvider`
interface, with a default `FrontendProvider` and the ability to set a
custom provider
* AI Configuration and Verbosity updates
* Enforced that a `SwapToken` must be present in `CommandOptsType` when
starting a remote shell with wsh, improving validation and error
handling. (`pkg/shellexec/shellexec.go`)
* Improved config directory watcher logic to log the config directory
path and avoid logging errors for non-existent subdirectories
This migrates all remaining eventbus events sent over the websocket to
use the wps interface. WPS is more flexible for registering events and
callbacks and provides support for more reliable unsubscribes and
resubscribes.
