feat(fusion_accounting): set module icon from Work in Progress source

Drops the 73KB icon.png into each of the four sub-modules
(fusion_accounting meta, _core, _ai, _migration) so Odoo's Apps page
renders the branded icon for each. Meta-module manifest 'icon' path
now points to its own icon instead of the AI sub-module's.

Made-with: Cursor

fusion_accounting/__manifest__.py

@@ -24,7 +24,7 @@ Future sub-modules (added per the roadmap as each Phase ships):
 
 Built by Nexa Systems Inc.
     """,
-    'icon': '/fusion_accounting_ai/static/description/icon.png',
+    'icon': '/fusion_accounting/static/description/icon.png',
     'author': 'Nexa Systems Inc.',
     'website': 'https://nexasystems.ca',
     'support': 'support@nexasystems.ca',