doc: create documentation (issue template)

Author: hozlucas28

.github/ISSUE_TEMPLATE/documentation_report.md

@@ -0,0 +1,8 @@
+---
+name: 'Report a missing documentation'
+about: 'Basic report template with a structure to report a missing documentation.'
+title: '<Verb in infinitive> Short title related to the missing documentation'
+labels: documentation
+---
+
+-   `<Function, Macro, Structure, etc. with missing documentation>`