- Resolves VUFIND-1340

Co-authored-by: Robert Lange <robert.lange@uni-leipzig.de>

- Refactor template and renderer determination in content controller
- Add TemplateBased ContentBlock for embedding static content in other contexts
- Includes improved test coverage

- More flexible options-element configuration
- Pass submitted form data to getRecipient. This allows one to extend the method and vary the recipient depending on form data.
- Refactor the list of form element setting fields to read from configuration to getFormElementSettingFields (again in order to ease extending).
- Fix bugs related to translation of submitted checkbox elements.

- add new itemPrefix/itemSuffix options.
- use schema.org property "datePublished" instead of invalid "publicationDate".
- schema.org changes for isbn, issn, identifier, language.
- use itemPrefix/itemSuffix for DOI + Edition.

- Resolves VUFIND-1384.

- Note that the database upgrade tool must be run after loading this commit to ensure that the shortlinks table's hash column is correctly populated.

- Add support for configuring help texts to be displayed before
  and/or after the form element.
- Move translation of help texts from template to Form handler
  in order to ease extending.
- Add form group specific CSS-classes.

- Eliminate deprecated annotations and method calls.
- Add required return types to standard methods.
- Add php-cs-fixer rules to improve tests.
- Add .gitignore support for new test result cache.
- Fixed a few minor bugs/bad comments identified while upgrading.

- Adds different labels for PDF and non-PDF full text in unpaywall doi linker
- Adjusts and enhances unpaywall tests

- Move configuration setting to constructor via factory (instead of using setConfig in ManagerFactory)
- Use camelCase for more parameters/variables
- Simplify/condense code where possible
- Add test coverage

- add missing array indexes to parseDOI return array
- set service_type to getDOI

- Includes added test coverage.

- Potentially useful for retrying after encountering problems.

- Email authentication is now possible as a stand-alone option (best combined with ChoiceAuth and a secondary option) or in conjunction with an ILS (supported drivers: Alma, Demo).