OTOOLS-122: Add _runPendingActivations to ext-webpack-plugin for npm 12 compatibility

[sencha-digit]

Findings

npm 12 dropped support for install lifecycle scripts in published packages. @sencha/ext-* packages relied on scripts.install: "node activate.js" to activate the Ext JS license on first use. That hook is now silently skipped, leaving the package non-functional after install.

Root cause

ext-webpack-plugin had no mechanism to trigger activate.js once the lifecycle script was removed.

Fix

Added _runPendingActivations() to pluginUtil.js (both src/ and compiled dist/), called at the top of _constructor() before the first webpack compilation.

The function scans node_modules/@sencha/*/activate.js and runs each found script synchronously via spawnSync. activate.js self-deletes after running (existing behaviour), so existsSync makes this a true one-shot check per install.

Related PRs

• extjs/SenchaDeploy #590 — removes scripts.install from published ext/cmd packages; converts activate.js to spawnSync
• sencha/ext-gen — removes scripts.install from @sencha/ext-gen; lazy install.js on first CLI invocation