Feature: Configurable default values for fields #353
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This PR adds a new "default" configuration option to fields that can be used to set a default value. The default is applied whenever no existing schema data is found for a page (for example a new page or a newly assigned schema). This also means that when adding a new field with default to a schema, the default value will not apply to already existing pages using this schema.
In addition, the default is used when adding struct fields to a bureaucracy plugin form.
If you merge this PR, please let me know once you have made a release containing the change available on dokuwiki.org, so that I can add the new option to the documentation at https://www.dokuwiki.org/plugin:struct:type.