Move rename-technical-ids-plugin to camunda-modeler-plugins

[Dennis-Fabri]

This plugin supports camunda best practices and is a really helpfull addition to the modeler. Therefore it should be placed side by side with other plugins.

Furthermore it is referenced from the plugins-repo and even its own source code refers to the plugins-repo as its homepage:

package.json:
"homepage": "https://github.com/camunda/camunda-modeler-plugins#readme",