Reduce API surface. We don't need so many variations of functions. Too
many functions means verbose, largely redundant documentation, tests,
and cognitive burden.
- Use correct implementation of text_edits.
- Send indent options to rangeFormatting and formatting.
- Remove references to vim bindings and filetype from lsp.txt
- Add more examples to docs.
- Add before_init to allow changing initialize_params.
- Rename builtin_callbacks to default_callbacks and slightly change its
semantics:
- No longer contains the default implementations. Instead, any
default_callbacks will be used in preference for our .buf methods.
- Add this to the docs.
Mainly configuration and RPC infrastructure can be considered "done". Specific requests and their callbacks will be improved later (and also served by plugins). There are also some TODO:s for the client itself, like incremental updates.
Co-authored by at-tjdevries and at-h-michael, with many review/suggestion contributions.
