fix!: do not keep persistent process by default

[sheremet-va]

By default, vscode extension doesn't keep any long-running processes anymore.

1. Process is spawned to read the config to get files and certain config values
2. Process is spawned to collect tests in the files, this will also read the config again
3. Process is spawned to run the test on a button click
4. Process is spawned to debug the test on a button click
5. Process is spawned to run tests with coverage on a button click
6. A long-running process is spawned when "turn on continuous run" button is clicked; it is closed if there are no continuous tests anymore (with a 1s delay in case a user wants to click on another test)
7. A new "Toggle Vitest Configs" command is added to remove certain tests from the tree (we still have to read the config to resolve the workspace properly) - fixes Allow on the fly toggling of configs #739

Fixes #592
Fixes #512
Fixes #671
Fixes #418
Fixes #648