many updates, added hardmode

lua/plugins/rustaceanvim.lua

@@ -0,0 +1,19 @@
+vim.g.rustaceanvim = {
+	tools = {
+		enable_clippy = true,
+		enable_nextest = true,
+		reload_workspace_from_cargo_toml = true,
+	},
+	server = {
+		-- cmd = { "nix", "run", "nixpkgs#rust-analyzer" },
+	},
+}
+
+return {
+	"mrcjkb/rustaceanvim",
+	version = "^5",
+	lazy = false, -- already lazy
+	ft = { "rust" },
+	keys = {},
+	command = "RustLsp",
+}