Use pyright as language server when `lsp-pyright` is available

Also ignore the .cache directory, as that's the one `lsp-pyright' is installing
it's local copy of `pyright` into.

.gitignore

@@ -59,3 +59,4 @@
 /flycheck_init.el
 /projects
 /.lsp-session-v1
+/.cache/

init.el

@@ -3020,6 +3020,9 @@ With given ARG, display files in `db/important-document-path’."
 
 (use-package python
   :config (progn
+            (unless (require 'lsp-pyright nil :no-error)
+              (message "`lsp-pyright' not available, using defaults from `lsp'"))
+
             (add-hook 'python-mode-hook #'highlight-indentation-mode)
             (add-hook 'python-mode-hook #'company-mode)
             (add-hook 'python-mode-hook #'lsp)))