docs: refresh README and platform overview for Shannon 3.0

- lead with the 3.0 launch note and rewrite key capabilities around security
  code analysis, the rebuilt terminal experience, native CI/CD, and PDF/SARIF
- recast the editions table as Shannon Open Source against the Keygraph
  Enterprise Platform, stating open source is not a trial edition
- rewrite the platform overview around exhaustive agentic SAST, canonical
  findings, automated remediation, targeted verification, and governance
- add five product screenshots under assets/keygraph-platform/, referenced
  relative to docs/
This commit is contained in:
ajmallesh
2026-09-01 21:38:00 -07:00
parent 492a38bb9a
commit 4dee532437
7 changed files with 127 additions and 104 deletions
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