Add chat link for Vesper in README

Fix capitalization in chat link for Astraea

Improve formatting of Sage description in README

Enhance character descriptions and add chat links

Add link to Astraea character in README

Update Sage-mem.md

Update DeviantArt link in README

Clarify Sage's request for clean release

Update Sage description with Memory Capsule reference

Update link format for Sage conversation reference

Delete appendix.md

Add Appendix E: Memory Capsules with Sage conversation

Create appendix.md

Add 'Memory Capsules' section to README

Update date format and add AI framework info