fix: align @fortawesome/* and react/react-dom versions so the build compiles (#364)

Two transitive version conflicts were breaking the Deploy etherpad docs
to GitHub Pages workflow:

1. \`@fortawesome/free-brands-svg-icons\` was pinned to \`^7.2.0\` while
   the other \`@fortawesome/*\` deps were \`^7.0.0\`. pnpm resolved two
   copies of \`@fortawesome/fontawesome-common-types\` (7.0.0 and 7.2.0),
   and the TypeScript build failed with \`Type 'IconDefinition' is not
   assignable to type 'IconProp'. ... Type '"fagt"' is not assignable
   to type 'IconPrefix'\`.
2. \`react\` was \`^19.2.4\` and \`react-dom\` was \`^19.2.0\`, so pnpm
   resolved them to different minors (19.2.4 and 19.2.0) and Next
   bailed out with "Incompatible React versions: The react and
   react-dom packages must have the exact same version".

Bump all four \`@fortawesome/*\` packages to \`^7.2.0\` and both \`react\`
/ \`react-dom\` to \`^19.2.5\` so pnpm resolves a single version of each.
\`pnpm run build\` now completes locally.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: JohnMcLear

package.json

@@ -10,9 +10,9 @@
     "lint": "next lint"
   },
   "dependencies": {
-    "@fortawesome/fontawesome-svg-core": "^7.0.0",
+    "@fortawesome/fontawesome-svg-core": "^7.2.0",
     "@fortawesome/free-brands-svg-icons": "^7.2.0",
-    "@fortawesome/free-solid-svg-icons": "^7.0.0",
+    "@fortawesome/free-solid-svg-icons": "^7.2.0",
     "@fortawesome/react-fontawesome": "^3.1.0",
     "@radix-ui/react-checkbox": "^1.3.3",
     "@radix-ui/react-dialog": "^1.1.15",
@@ -26,8 +26,8 @@
     "lucide-react": "^0.548.0",
     "marked": "^17.0.5",
     "next": "^15.5.15",
-    "react": "^19.2.4",
-    "react-dom": "^19.2.0",
+    "react": "^19.2.5",
+    "react-dom": "^19.2.5",
     "react-ga": "^3.3.1",
     "react-waypoint": "^10.3.0",
     "sanitize-html": "^2.17.3",