drm/doc: Add a section about "Task information" for the wedge API

Add a section about "Task information" for the wedge API.

Reviewed-by: Krzysztof Karas <krzysztof.karas@intel.com>
Reviewed-by: Raag Jadav <raag.jadav@intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://lore.kernel.org/r/20250617124949.2151549-5-andrealmeid@igalia.com


Signed-off-by: André Almeida <andrealmeid@igalia.com>