Document the precedence / behavior in case of multiple package configuration providers

[sschuberth]

This

ort/model/src/main/resources/reference.yml

Lines 42 to 51 in 811daef

	# Package configurations have to be unique by ID and provenance. Ensure that different providers do not provide
	# configurations for the same package, see https://github.com/oss-review-toolkit/ort/issues/6972 for details.
	packageConfigurationProviders:
	- type: DefaultDir
	- type: Dir
	id: SomeConfigDir
	options:
	path: '/some-path/'
	mustExist: true
	- type: OrtConfig

should be documented similar to curation providers at

ort/model/src/main/resources/reference.yml

Lines 53 to 55 in 811daef

	# Package curation providers are listed from highest to lowest priority. Technically, they are applied in reverse
	# order: The provider with the highest priority is applied last, so it can overwrite any previously applied curations.
	packageCurationProviders: