Merge pull request #4 from DavidLapous/multiparam_st_schreib_clean

Doc for Multi_filtration

src/Multi_filtration/doc/COPYRIGHT

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+The files of this directory are part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
+See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
+
+Author(s):       Hannah Schreiber, David Loiseaux
+
+Copyright (C) 2024 Inria
+
+This gives everyone the freedoms to use openFrameworks in any context:
+commercial or non-commercial, public or private, open or closed source.
+
+You should have received a copy of the MIT License along with this program.
+If not, see https://opensource.org/licenses/MIT.

src/Multi_filtration/doc/Intro_multi_filtration_values.h

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+/*    This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
+ *    See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
+ *    Author(s):       Hannah Schreiber
+ *
+ *    Copyright (C) 2024 Inria
+ *
+ *    Modification(s):
+ *      - YYYY/MM Author: Description of the modification
+ */
+
+#ifndef DOC_MULTI_FILTRATION_INTRO_H_
+#define DOC_MULTI_FILTRATION_INTRO_H_
+
+// needs namespace for Doxygen to link on classes
+namespace Gudhi {
+namespace multi_filtration {
+
+/** \defgroup multi_filtration Multi-parameter Filtration Values
+ * @{
+ * \author    David Loiseaux
+ *
+ * \section multifiltrationintro Multi-parameter Filtration Values
+ *
+ * TODO: introduction to @ref One_critical_filtration and @ref Multi_critical_filtration
+ * 
+ * \subsection multifiltrationexamples Examples
+ * 
+ * Here is a list of examples using the module:
+ * \li TODO?.
+ * 
+ * @}
+ */
+}  // namespace persistence_fields
+}  // namespace Gudhi
+
+#endif  // DOC_MULTI_FILTRATION_INTRO_H_