feat: rebrand OpenClaw references to Hermes during migration

- Add rebrand_text() that replaces OpenClaw, Open Claw, Open-Claw,
  ClawdBot, and MoltBot with Hermes (case-insensitive, word-boundary)
- Apply rebranding to memory entries (MEMORY.md, USER.md, daily memory)
- Apply rebranding to SOUL.md and workspace instructions via new
  transform parameter on copy_file()
- Fix moldbot -> moltbot typo across codebase (claw.py, migration
  script, docs, tests)
- Add unit tests for rebrand_text and integration tests for memory
  and soul migration rebranding

hermes_cli/claw.py

@@ -50,7 +50,7 @@ _OPENCLAW_SCRIPT_INSTALLED = (
 )
 
 # Known OpenClaw directory names (current + legacy)
-_OPENCLAW_DIR_NAMES = (".openclaw", ".clawdbot", ".moldbot")
+_OPENCLAW_DIR_NAMES = (".openclaw", ".clawdbot", ".moltbot")
 
 def _warn_if_gateway_running(auto_yes: bool) -> None:
     """Check if a Hermes gateway is running with connected platforms.
@@ -216,7 +216,7 @@ def _cmd_migrate(args):
         source_dir = Path.home() / ".openclaw"
         if not source_dir.is_dir():
             # Try legacy directory names
-            for legacy in (".clawdbot", ".moldbot"):
+            for legacy in (".clawdbot", ".moltbot"):
                 candidate = Path.home() / legacy
                 if candidate.is_dir():
                     source_dir = candidate