Scarb doc landing page + improved navigation

[maciektr]

No description provided.

[FroyaTheHen]

meeting summary:

• break the task into iterations and work in parts until satisfying result achieved

• organise landing page content: list the next steps, include succeeded/failed info, more info on the process, entry points, instructions

• hierarchy organised by modules, parent-child structure, consider improving the path (interactive link)

• (Starknet) organise storage and events: consider linking to the components

• consider including more event data

• dispatchers: link the dispatchers in the relevant trait separate section, consider custom logic for dispatcher documentation

• avoid mixing compiler generated and custom written code