Some tweaks to the CSS to have better contrast of the cards on the
homepage, and a few other places.
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
Fix a rare bug where some browsers seem to consider the welcome
admonition is overflowing.
This fixeszephyrproject-rtos/zephyr#101167.
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
Completely overhaul the documentation landing page to improve user
experience and navigability.
Key changes:
- Replace the static grid list with a modern, responsive HTML/CSS layout.
- Introduce "Persona" cards (App Developer, Hardware Engineer, Product
Maker) to guide users to relevant sections faster.
- Highlight key reference resources (API, Kconfig, DeviceTree, ...) in a
dedicated reference section.
- Call out "How to contribute" with a dedicated card.
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
