Remove Boost Dev Workflow Bottleneck

[iTinkerBell]

• Identify workflow bottlenecks: systematically find what slows down the workflow and remove/reduce those obstacles.
• Faster CI feedback: avoid the current “push branch → wait ~45 minutes” loop; shorten turnaround materially.
• Stop editing ci.yml: CI should not require manual maintenance of complex GitHub Actions YAML.
• Single-file build/CI spec: allow a simple per-library metadata file (example name given: AGENT.md) stating:
  • compiler minimums (e.g., gcc 7+, clang 13+, msvc 14.3+)
  • required C++ standard (e.g., C++20+)
  • docs pipeline note (e.g., “Docs are built with antora”)
• Reduce/avoid CMakeLists.txt maintenance: lower the ongoing burden of build system upkeep.
• Make repos easier for LLMs to help: adjust project structure/conventions so AI tools can operate more effectively.
• Open Boost superproject in Cursor: enable a workflow where the entire Boost superproject can be used in Cursor effectively (implies scalability/performance of tooling + indexing).