docs: rename CLAUDE.md to AGENTS.md and rebrand provider-agnostic

Delete CLAUDE.md in favor of AGENTS.md as the orientation doc, rebrand
the project from Codex-bottle to provider-agnostic bot-bottle, and
repoint every CLAUDE.md reference across PRDs, research notes, the
implementer agent example, and the yaml_subset comment.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/prds/0024-consolidate-sidecar-bundle.md

@@ -123,7 +123,7 @@ The feature is **done** when all of the following ship:
   - Integration: existing PRD 0001 / 0008 / 0013 / 0017
     integration tests run against the bundle and pass.
   - Integration: PRD 0022 sandbox-escape suite stays green.
-- `CLAUDE.md` updated to describe the bundle and the
+- `AGENTS.md` updated to describe the bundle and the
   daemons-inside layout.
 
 ## Non-goals
@@ -173,7 +173,7 @@ The feature is **done** when all of the following ship:
 - Test updates: unit and integration tests that probe the
   four-container shape get rewritten against the one-container
   shape.
-- README + CLAUDE.md doc updates.
+- README + AGENTS.md doc updates.
 
 ### Out of scope
 
@@ -399,7 +399,7 @@ rewrite.
    PRD 0022 stays green.
 5. **Docs + flag removal.** Flip the default, remove the
    feature flag, delete `Dockerfile.{egress,git-gate,supervise}`,
-   update README + CLAUDE.md.
+   update README + AGENTS.md.
 
 ## Open questions