Improve LSP configuration

* Add more recommended mappings
* Add Python LSP support with PyRight and Ruff

lua/plugins/completions.lua

@@ -38,8 +38,10 @@ return {
         'clangd',
         'cmake',
         'jsonls',
-        'lua_ls',
         'lemminx',
+        'lua_ls',
+        'pyright',
+        'ruff_lsp',
         'vimls',
         'yamlls',
       },
@@ -53,8 +55,7 @@ return {
 
         ['lua_ls'] = function()
           require('neodev').setup()
-          local lspconfig = require('lspconfig')
+          require('lspconfig').lua_ls.setup({
-          lspconfig.lua_ls.setup({
             settings = {
               Lua = {
                 diagnostics = {
@@ -64,7 +65,19 @@ return {
               }
             }
           })
-        end
+        end,
+
+        ['pyright'] = function()
+          require('lspconfig').pyright.setup({
+            settings = {
+              pyright = {
+                -- Using Ruff's import organizer
+                disableOrganizeImports = true,
+              },
+            }
+          })
+        end,
+
       },
     })
 
@@ -110,13 +123,14 @@ return {
         vim.keymap.set('n', '<leader>fi',
           require("actions-preview").code_actions, opts)
 
-        -- Goto definition mapping
+        -- Goto mappings
+        vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, opts)
         vim.keymap.set('n', 'gd', vim.lsp.buf.definition, opts)
-        -- TODO: nnoremap <silent> <leader>gt <Plug>(coc-type-definition)
+        vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, opts)
-        -- TODO: nnoremap <silent> <leader>gu <Plug>(coc-references-used)
+        vim.keymap.set('n', '<leader>D', vim.lsp.buf.type_definition, opts)
 
         -- Get references to symbol under cursor, store in quickfix window
-        vim.keymap.set('n', '<leader>gr', vim.lsp.buf.references, opts)
+        vim.keymap.set('n', 'gr', vim.lsp.buf.references, opts)
 
         -- Refactoring mappings
         vim.keymap.set('n', '<leader>rn', vim.lsp.buf.rename, opts)