message: introduce blog guidelines and policies
diff: [Overview](./README.md)
  - [Core](./core/README.md)
  + - [The rust blogs](./core/blogs.md)
  - [Compiler](./compiler/README.md)
  - [Bug Fix Procedure](./compiler/bug-fix-procedure.md)
  - [Cross Compilation](./compiler/cross-compilation/README.md)
  