docs: expand nanoflow skill with real-world patterns from test projects

Inspected 223 nanoflows across EnquiriesManagement, Evora-FactoryManagement,
and LatoProductInventory to derive idiomatic patterns. Added: decision guide
(nanoflow vs microflow), SYNCHRONIZE activity, 10 real-world patterns
(validation, navigation, progress wrapper, confirmation, auth, offline
connectivity, geolocation, platform detection, local storage, device comms),
full NanoflowCommons reference table (44 JS actions), per-action error
handling examples, and two additional checklist items.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: ako