Create a new section for tutorials / example experiments

[kingo55]

Outside of a Get Started guide and API reference, the best documentation often gives users practical examples so they can see how to use Mojito.

It might be useful to show users how to set up common & more complex experiments with Mojito, like:

• Standard A/B experiment
• MVT setup
• 90/10 split
• Complex triggers / race condition handling
• Veil timeouts
• Cross-test activation
• Test options overrides (alternative decision adapters / storage adapters etc)
• Divert to