Install @vercel/ncc

Preparing for turning GitGitGadget into a bunch of GitHub Actions, we
install `@vercel/ncc`, a 'simple CLI for compiling a Node.js module into
a single file, together with all its dependencies, gcc-style.'. This
will allow us to bundle a minimal set of Javascript files and publish
the result via a tag, ready to be consumed in GitHub workflows.

The idea is to run `ncc build -s -m lib/ci-helper.ts -o dist/` to obtain
a minimized `dist/index.js` that has no additional dependencies, and
then have subdirectories (e.g. `update-prs/`) defining a GitHub Action
via an `action.yml` file and a `index.js` file that starts with the
following line

	const { CIHelper } = require('../dist/index.js')

This will allow us to publish a single tag that backs the various
functionalities via different GitHub Actions, e.g:

	- uses: gitgitgadget/gitgitgadget/update-prs@v1
	  with:
	    config: ${{ vars.GITGITGADGET_CONFIG }}

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

package-lock.json

@@ -56,6 +56,7 @@
     "@types/node": "^24.3.0",
     "@types/nodemailer": "^7.0.0",
     "@types/rfc2047": "^2.0.3",
+    "@vercel/ncc": "^0.38.3",
     "eslint": "^9.33.0",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-jest": "^29.0.1",