v0.16.0

Changelog

• 2b404c7: auth: Grok subscription source (SuperGrok / X Premium+) (@timothyerwin)
• b4328be: catalog: grok-4.6 replaces grok-4.5; reverify token pricing (@timothyerwin)
• 21263dd: readme: drop env-var and config chatter (@timothyerwin)
• c0f995f: readme: mention Hermes migration alongside OpenClaw (@timothyerwin)
• 3b3148d: readme: rename intro header to Memcode (@timothyerwin)
• 52c4c01: readme: restructure around the Code / Agents split (@timothyerwin)
• 09b9232: readme: section headers for the intro and screenshots (@timothyerwin)
• d0e5675: readme: usage-first Code and Agents sections (@timothyerwin)
• e087181: runtime: EndChat actually ends the session scope (@timothyerwin)