Consolidate settings into a single file

Breaking changes

• Settings are now kept in a single settings.json file instead of separate ones for each handler. You will need to create a settings.json file to use this release and will need to modify your Docker configuration to mount the settings file either as a secret or have it present in your /config folder. A sample is included in the sampleConfiguration folder as a base to start from. It is essentially what was in the separate files previously now just merged into one file. Additionally all environment variables except for TZ are now just settings in this file. Any other environment variables for the trigger container can be removed from your Docker configuration.
• The source code repository's latest builds now produce out of the main branch. This means the location of the schema files has moved. If your triggers.json file has master in the $schema property you will need to update them to say main instead.

Non-breaking changes

• All the schema file references are updated to reflect the new main branch name. Resolves issue 255.
• The ability to disable verbose logging is back. Somehow between version 1.8.0 and now it broke. Resolves issue 257.