refactor: simplify script names for better ergonomics

Rename scripts to shorter, clearer names:
- build:custom-node → build:node (shorter)
- test:coverage → cover (matches common convention)
- Removed test:unit (redundant with test)

Now commands are more ergonomic:
  pnpm run build:node -- --yes    # Build custom Node.js
  pnpm run cover                   # Run coverage

Author: jdalton

package.json

@@ -180,21 +180,19 @@
     "build": "pnpm --filter @socketsecurity/cli run build --",
     "build:all": "pnpm --filter \"./packages/**\" run build",
     "build:cli": "pnpm run build --",
-    "build:custom-node": "pnpm --filter @socketbin/custom-node 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 --",
     "check": "pnpm --filter @socketsecurity/cli run check --",
     "check-ci": "pnpm run check -- --ci",
     "clean": "pnpm --filter \"./packages/**\" run clean",
-    "coverage:percent": "pnpm --filter @socketsecurity/cli run coverage:percent --",
+    "cover": "pnpm --filter @socketsecurity/cli run test:unit:coverage --",
     "lint": "pnpm --filter @socketsecurity/cli run lint --",
     "lint-ci": "pnpm run lint -- --ci",
     "prepare": "dotenvx -q run -f .env.local -- husky",
     "pretest": "pnpm run build",
     "test": "pnpm --filter @socketsecurity/cli run test:unit --",
     "test-ci": "pnpm run test -- --ci",
-    "test:coverage": "pnpm --filter @socketsecurity/cli run test:unit:coverage --",
-    "test:unit": "pnpm run test --",
     "type": "pnpm --filter @socketsecurity/cli run type --",
     "type-ci": "pnpm run type -- --ci"
   },