feat: stretch web part to full canvas width

Enable supportsFullBleed so the web part can sit in full-width sections,
and lift the SharePoint canvas max-width so it also fills a regular
one-column section (workbench and live page).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/webparts/stroyBot/StroyBotWebPart.manifest.json

@@ -11,6 +11,7 @@
   "requiresCustomScript": false,
   "supportedHosts": ["SharePointWebPart", "SharePointFullPage"],
   "supportsThemeVariants": true,
+  "supportsFullBleed": true,
 
   "preconfiguredEntries": [
     {