docs: add back-navigation link to cpp-linter hub (#445)

* docs: add back-navigation link to cpp-linter hub

* docs: add back-navigation to cpp-linter hub in mkdocs nav

* docs: use shields.io badge for back-navigation link

* Fix badge link for cpp-linter hub in README

* Update mkdocs.yml

Co-authored-by: Brendan <2bndy5@gmail.com>

* revert suggestion from @2bndy5

---------

Co-authored-by: Brendan <2bndy5@gmail.com>

Author: shenxianpeng

README.md

@@ -26,6 +26,7 @@
 [![cpp-linter](https://github.com/cpp-linter/cpp-linter-action/actions/workflows/cpp-linter.yml/badge.svg)](https://github.com/cpp-linter/cpp-linter-action/actions/workflows/cpp-linter.yml)
 [![MkDocs Deploy](https://github.com/cpp-linter/cpp-linter-action/actions/workflows/mkdocs-deploy.yml/badge.svg)](https://github.com/cpp-linter/cpp-linter-action/actions/workflows/mkdocs-deploy.yml)
 ![GitHub](https://img.shields.io/github/license/cpp-linter/cpp-linter-action?label=license&logo=github)
+[![cpp-linter hub](https://img.shields.io/badge/%F0%9F%8F%A0_cpp--linter_hub-%E2%86%90_home-22863a)](https://cpp-linter.github.io/)
 
 A Github Action for linting C/C++ code integrating clang-tidy and clang-format
 to collect feedback provided in the form of

mkdocs.yml

@@ -11,6 +11,7 @@ nav:
   - permissions.md
   - examples/index.md
   - contributing-guidelines.md
+  - "← cpp-linter org": https://cpp-linter.github.io/
 
 theme:
   name: material