re-add lspconfig capabilities

lua/plugins/configs/lspconfig.lua

@@ -12,6 +12,21 @@ local function on_attach(_, bufnr)
 end
 
 local capabilities = vim.lsp.protocol.make_client_capabilities()
+capabilities.textDocument.completion.completionItem.documentationFormat = { "markdown", "plaintext" }
+capabilities.textDocument.completion.completionItem.snippetSupport = true
+capabilities.textDocument.completion.completionItem.preselectSupport = true
+capabilities.textDocument.completion.completionItem.insertReplaceSupport = true
+capabilities.textDocument.completion.completionItem.labelDetailsSupport = true
+capabilities.textDocument.completion.completionItem.deprecatedSupport = true
+capabilities.textDocument.completion.completionItem.commitCharactersSupport = true
+capabilities.textDocument.completion.completionItem.tagSupport = { valueSet = { 1 } }
+capabilities.textDocument.completion.completionItem.resolveSupport = {
+   properties = {
+      "documentation",
+      "detail",
+      "additionalTextEdits",
+   },
+}
 
 -- requires a file containing user's lspconfigs
 local addlsp_confs = require("core.utils").load_config().plugins.options.lspconfig.setup_lspconf