Use the --build-sea flag when building the SEA

[weaponsforge]

What problem will this feature address?

Using the --build-sea flag when creating the SEA Windows executable (#27, #40) removes the need for manual blob injection using postject (an external library) with --sentinel-fuse.

Describe the solution you'd like

• Use the --build-sea flag when creating the SEA Windows executable.
• Uninstall postject from the devDependencies

Describe alternatives you've considered

Only the manual blob injection using postject with --sentinel-fuse (current setup) is the only alternative available option for building SEA for Node LTS v24+, this project's required Node version.

Additional context

• Removing the postject dependency slims the local dev build dependencies. Using the --build-sea flag aligns with the latest Node SEA build options moving forward.

Important

The --build-sea flag is currently available only in the Node v25.5.0+ Current Releases.
Apply this update as soon as the --build-sea option becomes available in the Node LTS releases