…FieldMapping__mdt and a new instance methods LogEntryEventBuilder.setField() & setFields()

… to a new dedicated class in extra-tests, along with a few custom fields to do a proper test (instead of using fields/overwriting existing field values)

…to fail in a few scenarios

Mappings for some objects (but not all objects) would cause failures

String values that exceed the target field's length would cause failures

Field mappings for incompatible data types (e.g., String --> Datetime) would cause failures

…se to PascalCase

Some legacy/older validation rules use Snake_Case, but overall, PascalCase is used for all metadata in Nebula Logger

…ate methods before non-test-visible private methods

…on layer (instead of the log management layer)

It's only used by the log management layer, but since it (generically) manages field mappings, it's really part of the configuration layer

…ing__mdt

…luded custom fields (also stored in the extra-tests directory)

These CMDT records are just to help with functionally/manually testing in a scratch org - they won't be included in any of the packages

This approach is more consistent with the singular naming convention used by other builder method overloads, like setRecord()

…s, and cleaned up/updated some other README contents

Also added .github/FUNDING.yml so the repo has a sponsor button