Supports some LSP bindings

[brianhuster]

Though Vim doesn't have support for LSP, it has built-in keybindings for a few LSP-like features, that includes:

• Go to definition: Ctrl-], Ctrl-Leftclick
• Go to local definition: gd
• Go to global definition: gD
• Show keyword documentation: K
• Formatting using external program: gq

The 0.11 version of Neovim provides more mappings for LSP https://neovim.io/doc/user/lsp.html#_defaults

[ristomatti]

@brianhuster Here's a starting point for implementing helix.neovim.vim:

" Goto mode
xnoremap <silent> gd :lua vim.lsp.buf.definition()<CR>
nnoremap <silent> gd :lua vim.lsp.buf.definition()<CR>
xnoremap <silent> gr :lua vim.lsp.buf.references()<CR>
nnoremap <silent> gr :lua vim.lsp.buf.references()<CR>
xnoremap <silent> gi :lua vim.lsp.buf.implementation()<CR>
nnoremap <silent> gi :lua vim.lsp.buf.implementation()<CR>

" Space mode
xnoremap <silent> <Space>r :lua vim.lsp.buf.rename()<CR>
nnoremap <silent> <Space>r :lua vim.lsp.buf.rename()<CR>
xnoremap <silent> <Space>s :lua vim.lsp.buf.document_symbol()<CR>
nnoremap <silent> <Space>s :lua vim.lsp.buf.document_symbol()<CR>
xnoremap <silent> <Space>k :lua vim.lsp.buf.signature_help()<CR>
nnoremap <silent> <Space>k :lua vim.lsp.buf.signature_help()<CR>