doc: extensions: samples: Introduce code sample categories
This commit adds support for categorizing code samples in the
documentation.
It introduces two new directives:
- `zephyr:code-sample-category::` to create a category and associated
brief description, that implicitly acts as a toctree too.
- `zephyr:code-sample-listing::` to allow dumping a list of samples
corresponding to a category anywhere in the documentation.
Fixes #62453.
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
6 files changed
