chore: Added lsp capabilities of nvim cmp. It can now do much more as LSPs see

nvim has more functionalities (Show unimported functions etc). Also
added better sorting to cmp entries. Added a notification when LSP
finished loading.

.config/nvim/lua/plugins/lspconfig.lua

@@ -1,10 +1,12 @@
 local mason_lspconfig = require "mason-lspconfig"
+local notify          = require "notify"
 
 mason_lspconfig.setup({
 	ensure_installed = { "sumneko_lua", "rust_analyzer", "texlab", "hls", "yamlls" },
 	automatic_installation = true
 })
 
+
 local opts = { noremap = true, silent = true }
 vim.keymap.set('n', '<space>e', vim.diagnostic.open_float, opts)
 vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, opts)
@@ -46,15 +48,32 @@ local on_attach = function(client, bufnr)
 	end
 end
 
+local on_init = function (client, initialize_result)
+	-- Alert user that LSP finished loading
+	notify("Finished loading " ..client.name, "info", {title = "LSP"})
+end
+
 local lspconfig = require "lspconfig"
 
+-- ADD NVIM CMP AS A CAPABILITY
+local lsp_defaults = lspconfig.util.default_config
+
+local capabilities = vim.tbl_deep_extend(
+  'force',
+  lsp_defaults.capabilities,
+  require('cmp_nvim_lsp').default_capabilities()
+)
+
+
 mason_lspconfig.setup_handlers {
 
 	-- This is a default handler that will be called for each installed server (also for new servers that are installed during a session)
 	function(server_name)
 		lspconfig[server_name].setup {
 			on_attach = on_attach,
+			on_init = on_init,
 			flags = lsp_flags,
+			capabilities = capabilities,
 		}
 	end,
 }