* docs: update README links to renamed orchestrator config files
## CHANGES
- Update orchestrator link to ide-bmad-orchestrator.md
- Update config link to ide-bmad-orchestrator.cfg.md
- Fix Markdownlint errors in ide-bmad-orchestrator.cfg.md
* docs: update path references from BETA-V3 to bmad-agent in instruction.md
## CHANGES
- Update all BETA-V3 directory references to bmad-agent
- Clarify paths are relative to bmad-agent directory
- Fix markdown formatting for numbered lists
- Update IDE orchestrator configuration path examples
- Correct agent-root path in Data Resolution section
- Remove references to deprecated BETA-V3 structure
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