When the `"when-workspace-opened-use-workspace-root"` setting is enabled
the clojure-lsp is started in _all_ workspace roots open instead of only
valid clojure project roots.

This commit reworks this behaviour to first check if the workspace root
is a valid Clojure project before attempting to auto-start the lsp
server.

Addresses BetterThanTomorrow#2041

This resolves a regression from BetterThanTomorrow#2020 which prevents certain vscode
operations such as organise-imports and add-missing-import from
functioning correctly.

This was a result of disabling the automatic command registrations being
performed by the lsp client. Originally it was assumed that these
commands were unused, however they are used internally by vscode to
handle their native organise-imports and related operations.

This is now fixed by manually registering the missing commands with the
added functionality of multi-client support.

Addresses BetterThanTomorrow#2041
Fixes BetterThanTomorrow#2040

The clojure-lsp refactor project in BetterThanTomorrow#2020 reworked the way the project
picker menus work, adding additional information on a second line
indicating which files contributed to a folder being picked as a valid
clojure project.

This turned out significant hurt the UX experience in workspaces with
many clojure projects.

This commit removes the additional information from the picker menus,
shrinking the list items to a single line.

Some other smaller changes included:

- Projects are now grouped by their workspace root which should help
  make it easier to sort through the list visually.
- Project folders are now sorted within their groups to make the list
  more deterministic.
- Project folders show the path relative to the workspace root instead
  of the absolute path. This should help make scanning the list easier
  by removing unnecessary/duplicate information.

Addresses BetterThanTomorrow#2041
Closes BetterThanTomorrow#2043

Closes BetterThanTomorrow#2041

Co-authored-by: Brandon Ringe <12722744+bpringe@users.noreply.github.com>