Replace the Python CLI with a Node CLI, add a systemd service command

The app is already 100% Node, so the Python launcher was pure overhead - it
existed mainly to bootstrap Node, which is circular. The CLI is now merged
into app/ (the single published npm package): `triggershell start` validates
the config and imports server.ts directly in-process, so server.ts's own
SIGTERM/SIGINT handling just works with no signal-relay/child-process layer
needed. `dev` is dropped from the public CLI (contributors use `pnpm --dir
app dev` directly); there's no `build` command either, since the package
ships a prebuilt `.next` via a `prepack` hook. Adds `triggershell service
install|uninstall|status` for running as a per-user or system systemd unit.

Also fixes two bugs found while wiring this up: server.ts resolved `.next`
relative to `process.cwd()`, which broke once the CLI could run from a
directory other than the app itself; and an explicitly-`files`-listed
package directory bypasses .npmignore for its subpaths, so `.next/cache`
was inflating the npm tarball to ~670MB (now stripped in `prepack`, ~7MB).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/package.json

@@ -1,13 +1,31 @@
 {
-  "name": "app",
+  "name": "triggershell",
   "version": "0.1.0",
-  "private": true,
+  "license": "MIT",
   "type": "module",
   "repository": {
     "type": "git",
     "url": "https://dev.pivoine.art/valknar/triggershell.git",
     "directory": "app"
   },
+  "bin": {
+    "triggershell": "bin/triggershell.js"
+  },
+  "engines": {
+    "node": ">=20"
+  },
+  "files": [
+    "bin",
+    "src",
+    "templates",
+    "drizzle",
+    ".next",
+    "server.ts",
+    "next.config.ts",
+    "next-env.d.ts",
+    "tsconfig.json",
+    "LICENSE"
+  ],
   "scripts": {
     "dev": "tsx watch server.ts",
     "build": "next build",
@@ -15,13 +33,15 @@
     "lint": "eslint",
     "typecheck": "tsc --noEmit",
     "format": "prettier --write .",
-    "validate-config": "tsx scripts/validate-config.ts",
+    "test": "tsx --test \"src/cli/**/*.test.ts\"",
     "db:generate": "drizzle-kit generate",
-    "db:studio": "drizzle-kit studio"
+    "db:studio": "drizzle-kit studio",
+    "prepack": "rm -rf .next && next build && rm -rf .next/cache"
   },
   "dependencies": {
     "@base-ui/react": "^1.7.0",
     "@hookform/resolvers": "^5.8.0",
+    "@inquirer/prompts": "^8.5.2",
     "@xterm/addon-fit": "^0.11.0",
     "@xterm/xterm": "^6.0.0",
     "argon2": "^0.45.1",
@@ -29,6 +49,7 @@
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "cmdk": "^1.1.1",
+    "commander": "^15.0.0",
     "drizzle-orm": "^0.45.2",
     "execa": "^10.0.1",
     "iron-session": "^8.0.4",
@@ -43,6 +64,7 @@
     "shadcn": "^4.18.0",
     "sonner": "^2.0.8",
     "tailwind-merge": "^3.6.0",
+    "tsx": "^4.23.12",
     "tw-animate-css": "^1.4.0",
     "ws": "^8.21.3",
     "yaml": "^2.9.0",
@@ -63,7 +85,6 @@
     "prettier": "^3.9.6",
     "prettier-plugin-tailwindcss": "^0.8.1",
     "tailwindcss": "^4",
-    "tsx": "^4.23.12",
     "typescript": "^5"
   },
   "packageManager": "pnpm@11.21.0"