Fix file-symbols, respect lsp-use-plists

Version 1.0

Mark API as stable:
- the 3 `(interactive)` commands,
- the name and usage of the custom variables

Remove consult-lsp-marginalia

Fix small bug with severity sorting in diagnostics

Version 0.6

Formatting enhancements and prefix-argument for
`consult-lsp-file-symbols`

0.5

- Add consult-lsp-file-symbols command for file-local symbol query
- Add more defcustom to allow personnalization of the UX
- (unstable) Add consult-lsp-marginalia-mode to toggle marginalia support

Stop using consult-async-default-split (#12)

It's been deprecated, the interface for setting the async splitting
changed.

Fixes #11

First MELPA release

First "stable" version

Provide new commands consult-lsp-symbols and consult-lsp-diagnostics