refactor: implement unified build command pattern

Replace separate build:* commands with single build command that accepts
--target flag for routing to different packages.

Usage:
- pnpm run build (defaults to CLI)
- pnpm run build -- --target all
- pnpm run build -- --target node
- pnpm run build -- --target sea
- pnpm run build -- --target socket

All other flags are passed through to the target package build script.

Author: jdalton

package.json

@@ -177,12 +177,7 @@
   },
   "private": true,
   "scripts": {
-    "build": "pnpm --filter @socketsecurity/cli run build --",
-    "build:all": "pnpm --filter \"./packages/**\" run build",
-    "build:cli": "pnpm run build --",
-    "build:node": "pnpm --filter @socketbin/custom-node run build --",
-    "build:sea": "pnpm --filter @socketbin/sea run build --",
-    "build:socket": "pnpm --filter socket run build --",
+    "build": "node scripts/build.mjs",
     "check": "pnpm --filter @socketsecurity/cli run check --",
     "check-ci": "pnpm run check -- --ci",
     "clean": "pnpm --filter \"./packages/**\" run clean",

scripts/build.mjs

@@ -0,0 +1,54 @@
+#!/usr/bin/env node
+
+/**
+ * Unified build script router.
+ * Routes build commands to appropriate packages based on --target flag.
+ */
+
+import { spawnSync } from 'node:child_process'
+import process from 'node:process'
+
+const TARGET_PACKAGES = {
+  __proto__: null,
+  all: './packages/**',
+  cli: '@socketsecurity/cli',
+  node: '@socketbin/custom-node',
+  sea: '@socketbin/sea',
+  socket: 'socket'
+}
+
+const args = process.argv.slice(2)
+let target = 'cli'
+const buildArgs = []
+
+for (let i = 0; i < args.length; i++) {
+  const arg = args[i]
+  if (arg === '--target' && i + 1 < args.length) {
+    target = args[++i]
+  } else {
+    buildArgs.push(arg)
+  }
+}
+
+const packageFilter = TARGET_PACKAGES[target]
+if (!packageFilter) {
+  console.error(`Unknown build target: ${target}`)
+  console.error(`Available targets: ${Object.keys(TARGET_PACKAGES).join(', ')}`)
+  process.exit(1)
+}
+
+const pnpmArgs = [
+  '--filter',
+  packageFilter,
+  'run',
+  'build',
+  ...buildArgs
+]
+
+const result = spawnSync('pnpm', pnpmArgs, {
+  encoding: 'utf8',
+  shell: false,
+  stdio: 'inherit'
+})
+
+process.exit(result.status ?? 1)