chore(reallife/examples): cleanup examples page

Conflicts:
	site/src/documents/real-life/examples/index.html.eco
chore(examples): restructure page

Conflicts:
	site/src/files/app/css/style.css
fix(howtos): links to examples

Conflicts:
	site/src/documents/real-life/how-to/chapters/080-cockpit
/develop-cockpit-plugin.html.md
	site/src/documents/real-life/how-to/chapters/100-modeler/custom-
task.html.md
chore(*): fix links to example repo

Conflicts:
	site/src/documents/guides/user-guide/chapters/07-model-api/04-fluent-builder-api.html.md
	site/src/documents/real-life/how-to/chapters/040-ui/020-jsf-task-forms.html.md
chore(examples): fix links
fix(enterprise): dead link