Pin webpackbar to v7 to fix webpack 5.106 compat (#698)

webpack 5.106.0 removed name/color/reporters/reporter options from
ProgressPlugin schema validation. webpackbar v6 (used by Docusaurus
3.10) passes these options, breaking production builds.

Override webpackbar to ^7.0.0 until Docusaurus 3.10.1 ships a fix.
See: facebook/docusaurus#11923

Co-authored-by: Dan Barr <6922515+danbarr@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: danbarr

package-lock.json

@@ -68,5 +68,8 @@
   "engines": {
     "node": "24",
     "npm": "^11.7.0"
+  },
+  "overrides": {
+    "webpackbar": "^7.0.0"
   }
 }