[documentation] readme links update (#5)

.clang-format

@@ -34,7 +34,7 @@ PenaltyReturnTypeOnItsOwnLine: 60
 PointerBindsToType: false
 SpacesBeforeTrailingComments: 1
 Cpp11BracedListStyle: false
-Standard:        c++20
+Standard:        Latest
 IndentWidth:     2
 TabWidth:        2
 UseTab:          Never

README.md

@@ -4,6 +4,8 @@ A generic Kalman filter.
 
 # Continuous Integration & Deployment Actions
 
+[![Code Repository](https://img.shields.io/badge/Repository-GitHub%20%F0%9F%94%97-brightgreen)](https://github.com/FrancoisCarouge/Kalman)
+<br>
 [![Test: Ubuntu 20.04 GCC Trunk](https://github.com/FrancoisCarouge/Kalman/actions/workflows/verify_test_ubuntu-20-04_gcc-trunk.yml/badge.svg)](https://github.com/FrancoisCarouge/Kalman/actions/workflows/verify_test_ubuntu-20-04_gcc-trunk.yml)
 <br>
 [![Test: Windows 2019 MSVC](https://github.com/FrancoisCarouge/Kalman/actions/workflows/verify_test_windows-2019_msvc.yml/badge.svg)](https://github.com/FrancoisCarouge/Kalman/actions/workflows/verify_test_windows-2019_msvc.yml)
@@ -30,6 +32,12 @@ A generic Kalman filter.
 <br>
 [![Test Documentation: Doxygen](https://github.com/FrancoisCarouge/Kalman/actions/workflows/verify_documentation_doxygen.yml/badge.svg)](https://github.com/FrancoisCarouge/Kalman/actions/workflows/verify_documentation_doxygen.yml)
 <br>
+[![Public Domain](https://img.shields.io/badge/License-Public%20Domain%20%F0%9F%94%97-brightgreen)](https://raw.githubusercontent.com/francoiscarouge/Kalman/develop/LICENSE.txt)
+<br>
+[![License Scan](https://app.fossa.com/api/projects/git%2Bgithub.com%2FFrancoisCarouge%2FKalman.svg?type=shield)](https://app.fossa.com/projects/git%2Bgithub.com%2FFrancoisCarouge%2FKalman?ref=badge_shield)
+<br>
+[![Sponsor](https://img.shields.io/badge/Sponsor-%EF%BC%84%EF%BC%84%EF%BC%84%20%F0%9F%94%97-brightgreen)](http://paypal.me/francoiscarouge)
+<br>
 <br>
 [![Deploy Documentation: Doxygen GitHub Pages](https://github.com/FrancoisCarouge/Kalman/actions/workflows/deploy_documentation_doxygen.yml/badge.svg)](https://github.com/FrancoisCarouge/Kalman/actions/workflows/deploy_documentation_doxygen.yml)
 <br>