add structure and todos

Author: Francesco Calcavecchia

docs/inheritance_and_composition.md

@@ -7,6 +7,26 @@ allows you to reuse code and structure from the parent template while adding or
 overriding specific parts in the child template. This is useful for creating variations
 of a template without duplicating code.
 
+<!-- TODO: add an example of inheritance -->
+
 Template Composition, on the other hand, is a way to combine multiple templates,
 independent of each other, into a single new template. In this way you can join the
 functionalities of multiple templates, by adding some "glue code", and avoid repetition.
+
+<!-- TODO: add an example of composition -->
+
+<!-- TODO? (not sure if it relevant...) add an operational distinction between the two >
+
+## Solutions
+
+### Git submodules + jinja template inheritance
+
+<!-- TODO: Add content-->
+
+### Fork-like approach
+
+<!-- TODO: Add content-->
+
+### Leverage on copier task
+
+<!-- TODO: Add content-->