Startup and keep alive the analyzer/Kai runtime

The plugin is responsible for managing the runtime (start, stop, restart) and for reporting its status.

Story highlights

After initial install / start of the extension, decide what needs to be done:
- attempt to start the embedded servers with default configs, OR
- open the configuration view to force user interaction to verify configuration
Configuration view should have a 'Test' button to:
- verify the configuration is valid (according to some static criteria / schema validation),
- verify the agent server can be started,
- verify the server can receive initialization configuration and the response is a positive ack
Status indication on vscode's status bar
- Show "status bar item" for the whole workspace
  - When an action is running, have a visual indicator (spinner)
  - Hovering the status shows brief information
  - Clicking the status indicator ...
  - Open relevant command palette?
  - Open configuration view?
- Show "status bar item" for an open file
  - When changes for a file are being processed, have a visual indicator
  - Hovering the status shows a count of issues in the file
  - Clicking the status indicator ...
  - Open relevant command palette?
  - Open configuration view?
Provide logs to a selectable Output view
- one log for any server being managed by the plugin
- any other trace logging that could be useful
Command Palette
- Open configuration view
- Restart server (for each server that is manageable)

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