feat: move fundraising module to monorepo

[Pantani]

Move the fundraising module to here so we can use a module monrepo

We should add this to the commit before squash:

This commit migrates the [fundraising repo](https://github.com/tendermint/fundraising) module to this ignite module repository.

Co-authored-by: @jaybxyz <JayB>
Co-authored-by: @Pantani <Danilo Pantani>
Co-authored-by: @jeonghoyeo7 <Jeongho Yeo>
Co-authored-by: @CoinedLiberty <Taeyoung Park>
Co-authored-by: @hallazzang <Hanjun Kim>
Co-authored-by: @jeronimoalbi <Jerónimo Albi>
Co-authored-by: @dongsam <dongsam>
Co-authored-by: @bobkilla <Renneville Guybert>