T22: Fix agent entries — add verified GitHub links, remove 3 fabricated entries

- Updated ZeroClaw: added GitHub link (zeroclaw-labs/zeroclaw, 29K+ stars)
- Updated NullClaw: added GitHub link (nullclaw/nullclaw, 7K+ stars)
- Updated Moltis: added GitHub link (moltis-org/moltis, 2.4K+ stars), fixed description
- Updated Hermes Agent: added GitHub link (NousResearch/hermes-agent, 22K+ stars), fixed description
- Updated PicoClaw: added GitHub link (sipeed/picoclaw, 27K+ stars), fixed description
- Removed fabricated 'Manus' duplicate (real Manus AI stays at line 810)
- Removed fabricated 'Clam' (no verifiable repo or product found)
- Removed fabricated 'Taskllet' (no verifiable repo; Tasklet.ai is different product)

Author: Shaerif