Rename the project to Kubeshark (#1226)

* Rename `mizu` to `kubeshark`

* Rename `up9inc` to `kubeshark`

* Change the logo, title, motto and the main color

* Replace the favicon

* Update the docs link

* Change the copyright text in C files

* Remove a comment

* Rewrite the `README.md` and update the logo and screenshots used in it

* Add a `TODO`

* Fix the grammar

* Fix the bottom text in the filtering guide

* Change the Docker Hub username of cross-compilation intermediate images

* Add an install script

* Fix `docker/login-action` in the CI

* Delete `build-custom-branch.yml` GitHub workflow

* Update `README.md`

* Remove `install.sh`

* Change the motto back to "Traffic viewer for Kubernetes"

.github/workflows/test.yml

@@ -11,7 +11,7 @@ on:
       - 'main'
 
 concurrency:
-  group: mizu-tests-validation-${{ github.ref }}
+  group: kubeshark-tests-validation-${{ github.ref }}
   cancel-in-progress: true
 
 jobs: