fix: pydantic config settings fixes

[NTFSvolume]

1. Rewrite config file if one of the keys was missing (new logic)
2. Fix AppriseURL model rejecting empty tags
3. Add missing setting aliases
4. Validate all configs when running with --config ALL
5. Other minor fixes

[NTFSvolume]

Added some pre-validators to automatically handle common invalid values and smooth the transition a bit

[datawhores]

I tested this out
So far everything seems to be working

There is a small validation error with browser sites, but that might be from the current master
The merge conflict was minor

[NTFSvolume]

Updates

1. Add timedelta and date yaml representer
2. Rename all log filename options cause now they are not filenames, they are paths. The old config settings and CLI argumets still work but they are now in the deprecated group
3. Add additional pre-validators and fix URLs pre-validators
4. Replace Forums and Websites enums with regular strings. Enums were giving warnings by pydantic because their names and their values were different.

This PR has many commits but they do not have significant value on their own. Please squash before merging.