doc: create improvement (issue template)

Author: hozlucas28

.github/ISSUE_TEMPLATE/improvement_report.md

@@ -0,0 +1,14 @@
+---
+name: 'Report a wanted improvement'
+about: 'Basic report template with a structure to report a wanted improvement.'
+title: '<Verb in infinitive> Short title related to the improvement'
+labels: improvement
+---
+
+## Description
+
+\<Short description of the improvement>
+
+## Benefits
+
+\<Benefits on implementing the improvement>