Incorporate more 3.16 features

[KamasamaK]

Many changes have been made for the 3.16 release of LSP, so I've collected a lot of them.

Added

• Change annotations for WorkspaceEdit (via ResourceOperation) and AnnotatedTextEdit
• Linked editing (Fixes Support for textDocument/onTypeRename #469)
• Opening and showing a document in the client user interface
• Refresh support for code lenses and semantic tokens
• Provide the client's locale in the initialize call
• Preserve additional attributes on MessageActionItem
• Capability to signal whether the client normalizes line endings
• Insert text mode on CompletionItems
• Insert/replace for CompletionItem text edits
• Default behavior for prepare rename
• Overlapping and multiline support for semantic tokens
• Monikers (Fixes Support for Monikers #448)
• Trace notifications (Fixes Support Trace notifications #455)
• Regular expression engine support
• Markdown parser support
• Progress support for rename, color provider, folding range provider, and document range formatting
• Missing properties on ApplyWorkspaceEditResponse

Removed

• Non-standard feature Coloring is removed as it was already deprecated in favor of Semantic Highlighting which is itself deprecated in favor of Semantic Tokens (See Removing Semantic Highlighting #457)

Compatibility issues

• Changed some types from Number to Integer
• ProgressParams missing nullability checks
• CompletionItem.textEdit now an Either

[szarnekow]

Thank you for the effort, @KamasamaK .
I'm not a maintainer of lsp4j but a consumer thus I try to follow the changes that are made. I've to say this is a huge merge request. Unfortunately it mixes different changes (all towards 3.16, but still). Would it by chance be feasible to split that up into smaller digestible chunks?

I'm through with the review yet but wanted to post the first small batch of comments and trigger this discussion.

[nixel2007]

Any chance to add DocumentSymbolOptions and label field?
p.s. thanks for your work!