Add tips for good applications

[semuelle]

Please review and add what you can think of.

[PieWol]

Great content. The only downside I see is that our docs are already quite a lot of text. I think the overlap with https://grants.web3.foundation/docs/Introduction/intro is too much for this to deserve it's own additional entry. How about we extend the guideline content instead? We could also split the current guidelines to only feature formal necessities and move all current tips from there into this newly proposed Tips for submitting a good grant application section. Let me know what you think :)

[semuelle]

I was just going to propose moving the "your project will have better chances to be accepted if" section here, but you beat me to it. It's poorly structured anyway: "This is what we want" - "This makes it better" - "This is also required".

I'll give it a try.