Add support for proposed 3.17 APIs

[baronfel]

3.17 adds APIs for the following features:

• Specify how clients will handle stale requests.
• Add support for a completion item label details.
• Add support for workspace symbol resolve request.
• Add support for label details and insert text mode on completion items.
• Add support for shared values on CompletionItemList.
• Add support for HTML tags in Markdown.
• Add support for collapsed text in folding.
• Add support for trigger kinds on code action requests.
• Add the following support to semantic tokens:
• server cancelable
• augmentation of syntax tokens
• Add support to negotiate the position encoding.
• Add support for HTML tags in markdown.
• Add support for relative patterns in file watchers.
• Add support for type hierarchies
• Add support for inline values.
• Add support for inlay hints.
• Add support for notebook documents.
• Add support for diagnostic pull model.

We should add our side to match.

[TheAngryByrd]

#52 covers a lot of these.

[TheAngryByrd]

with #49 and #67 I'm going to close this. Anything that isn't covered by those PRs should open a new issue.