[gem-team] Designer Updates, hanlde failures in all agents (#1474)

* feat: move to xml top tags for ebtter llm parsing and structure

- Orchestrator is now purely an orchestrator
- Added new calrify  phase for immediate user erequest understanding and task parsing before workflow
- Enforce review/ critic to plan instea dof 3x plan generation retries for better error handling and self-correction
- Add hins to all agents
- Optimize defitons for simplicity/ conciseness while maintaining clarity

* feat(critic): add holistic review and final review enhancements

* chore: bump marketplace version to 1.10.0

- Updated `.github/plugin/marketplace.json` to version 1.10.0.
- Revised `agents/gem-browser-tester.agent.md` to improve the BROWSER TESTER role documentation with a clearer structure, explicit role header, and organized knowledge sources section.

* refactor: streamline verification and self‑critique steps across browser‑tester, code‑simplifier, critic, and debugger agents

* feat(researcher): improve mode selection workflow and research implementation details

- Refine **Clarify** mode description to emphasize minimal research for detecting ambiguities.
- Reorder steps and clarify intent detection (`continue_plan`, `modify_plan`, `new_task`).
- Add explicit sub‑steps for presenting architectural and task‑specific clarifications.
- Update **Research** mode section with clearer initialization workflow.
- Simplify and reformat the confidence calculation comments for readability.
- Minor formatting tweaks and added blank lines for visual separation.

* Update gem-orchestrator.agent.md

* docs(gem-browser-tester): enhance BROWSER TESTER role description and clarify workflow steps- Expanded the BROWSER TESTER role with explicit responsibilities and constraints
- Reformatted the Knowledge Sources list using consistent numbered items for readability- Updated the Workflow section to detail initialization, execution, and teardown steps more clearly- Refined the Output Format and Research Format Guide structures to use proper markdown syntax
- Improved overall formatting and consistency of documentation for better maintainability

* docs: fix typo in delegation description

.github/plugin/marketplace.json

@@ -268,7 +268,7 @@
       "name": "gem-team",
       "source": "gem-team",
       "description": "Multi-agent orchestration framework for spec-driven development and automated verification.",
-      "version": "1.6.6"
+      "version": "1.13.0"
     },
     {
       "name": "go-mcp-development",