Merge remote-tracking branch 'nanoresearch/main' into self-evolution

Update README_en.md

Update README.md

use Issue attachment URL for CLI demo video in READ

use raw URL for in-repo demo video in README

add README showcase images and CLI demo video

Refresh README (CN/EN) and add showcase assets

feat: add autoskill lifecycle with skill review

feat: add failure-aware conditional memory

feat: add direction and strategy memory evolution

feat: add self-evolving memory and skill adaptation

docs: remove shared agent integration file

docs: inline agent integration docs

Merge remote-tracking branch 'nanoresearch/main' into zip-fix17

docs: add Codex integration entrypoint