Add Hyprland skill and configuration files; enhance installation process with GPU detection and SDDM support

src/install.ts

@@ -1,11 +1,14 @@
 import * as p from "@clack/prompts";
 import { groups, packages, toDirs } from "./packages.js";
+import { detectGpuVendors, driverPackagesFor } from "./gpu.js";
 import {
   backupConflicts,
+  ensureSddmEnabled,
   ensureYay,
   ensureZsh,
   installPackages,
   stow,
+  writeNvidiaEnvConfig,
   writeState,
 } from "./stow.js";
 
@@ -36,10 +39,33 @@ export async function install() {
   if (p.isCancel(picks)) return p.cancel("Install cancelled.");
   for (const name of picks as string[]) chosen.add(name);
 
+  const gpuVendors = detectGpuVendors();
+  const gpuOptions = gpuVendors.flatMap((vendor) =>
+    driverPackagesFor([vendor]).map((pkg) => ({ value: pkg, label: `${vendor}: ${pkg}` })),
+  );
+  let gpuPicks: string[] = [];
+  if (gpuOptions.length > 0) {
+    const picked = await p.multiselect({
+      message: "Detected GPU(s) — confirm driver packages to install",
+      options: gpuOptions,
+      initialValues: gpuOptions.map((o) => o.value),
+      required: false,
+    });
+    if (p.isCancel(picked)) return p.cancel("Install cancelled.");
+    gpuPicks = picked as string[];
+    for (const name of gpuPicks) chosen.add(name);
+  }
+
   installPackages([...chosen]);
 
+  ensureSddmEnabled();
+
   if (chosen.has("zsh")) ensureZsh();
 
+  if (gpuVendors.includes("nvidia") && driverPackagesFor(["nvidia"]).some((pkg) => gpuPicks.includes(pkg))) {
+    writeNvidiaEnvConfig();
+  }
+
   const dirs = toDirs([...chosen]);
   const backupDir = backupConflicts(dirs);
   if (backupDir) p.log.info(`Backed up conflicting files to ${backupDir}`);