fix: not loading same component multiple times

[miki725]

• Followed the steps in the contributor's guide: https://crashoverride.com/docs/other/contributing#filing-the-pull-request
• PR title uses semantic commit messages
• Filled out the template to a useful degree

Issue

#74

Description

When adding line to the config for the component, checks if that line is already present. This avoid adding duplicate lines to the config

Testing

➜ make tests args="test_config.py::test_load_duplicate --logs --pdb"