- Resolves VUFIND-1384.

This allows the factory to create also subclasses of the Markdown class.

- 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.

- Allows login with institution ID instead of barcode.
- Includes some variable renaming and null coalescing for improved style/clarity.

* Prototype of ParentTemplate helper.

* Check for bottom of theme stack.

* Move helper to VuFindTheme. Remove templatePath functionality.

* Add templatePath helper for getting a template from any theme.

* Documentation and checkstyles.

* php-cs-fixer

* Fix copy-typo.

* Add unit-test.

* Checkstyles.

* Checkstyles: return value

* Checkstyles: exception test - comments to code.

* Update package.json to eliminate vulnerabilities.

* Add TemplatePath tests.

- Simplify querying
- Improve date processing

- 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

- This is best used with the local Solr reserves index; real-time support is inefficient due to API limitations. It may be possible to optimize this in future if the FOLIO Reserves API is revised.

- Improve comments/variable names to more accurately represent ID types being used in code.
- Add configuration setting to allow VuFind's bib ID to correspond to FOLIO's instance UUID or human-readable ID
- Perform exact-match searching in CQL queries for improved performance

Co-authored-by: Demian Katz <demian.katz@villanova.edu>

- Includes refactoring to build \VuFind\Sitemap\Generator through the service manager.

- Provides a faster way to retrieve lists of identifiers without extra baggage.
- Fails over to proxy the regular search method when unsupported by the backend.

- Eliminate ZF2 references to prevent confusion after Laminas migration.

- Part of preparation for Laminas.

- Preparing for Laminas migration.