QUAL Use phan to help detect new issues (#27706)

* Qual: Add phan flow

- Add phan configuration (config, baseline, stubs);
- Add github action;
- Update apstats.php.

* Add directives to ignore false phan notices

* Qual: Add typing hints for extrafields TPL files

# Qual: Add typing hints for extrafields TPL files

Add typing hints for phan on view files

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Co-authored-by: Laurent Destailleur <eldy@destailleur.fr>

htdocs/api/class/api_setup.class.php

@@ -2091,6 +2091,7 @@ class Setup extends DolibarrApi
 		if (LIBXML_VERSION < 20900) {
 			// Avoid load of external entities (security problem).
 			// Required only if LIBXML_VERSION < 20900
+			// @phan-suppress-next-line PhanDeprecatedFunctionInternal
 			libxml_disable_entity_loader(true);
 		}