INI inventory plugin: add documentation about variable types (#25798)

* INI inventory: check variable types
* INI inventory: add doc about variable types

Fixes #25784

lib/ansible/plugins/inventory/ini.py

@@ -27,6 +27,9 @@ DOCUMENTATION:
         - The C(children) modifier indicates that the section contains groups.
         - The C(vars) modifier indicates that the section contains variables assigned to members of the group.
         - Anything found outside a section is considered an 'ungrouped' host.
+        - Values passed in using the C(key=value) syntax are interpreted as Python literal structure (strings, numbers, tuples, lists, dicts,
+          booleans, None), alternatively as string. For example C(var=FALSE) would create a string equal to 'FALSE'. Do not rely on types set
+          during definition, always make sure you specify type with a filter when needed when consuming the variable.
     notes:
         - It takes the place of the previously hardcoded INI inventory.
         - To function it requires being whitelisted in configuration.