add rust support

pkgs/nvchad/nvim/lua/configs/rustaceanvim.lua

@@ -0,0 +1,17 @@
+local configs = require("nvchad.configs.lspconfig")
+local on_attach = configs.on_attach
+local capabilities = configs.capabilities
+
+vim.g.rustaceanvim = {
+  server = {
+    on_attach = on_attach,
+    capabilities = capabilities,
+    default_settings = {
+      ["rust-analyzer"] = {
+        cargo = {
+          allFeatures = true,
+        },
+      },
+    },
+  },
+}