Mint and distribute Contribution Token via pallet_asset

[lrazovic]

Add the (basic) ability to create and mint Contribution Tokens via pallet_asset.

1. Loosely coupled pallet_asset to pallet_funding

• The Asset is created via a create() extrinsic (provided by pallet_asset) at the end of the Community Round
  • Parameters:
    • id: The identifier of the new asset. We use the T::ProjectIdentifier.
    • admin: The admin of this class of assets. The Issuer of the project.
    • min_balance: The minimum balance of this new asset that any single account must have. Se via the Issuer when the project is created.
• The Asset's metadata are set via the set() extrinsic (provided by pallet_asset)
• Users, with the right credentials, can claim their contribution tokens using the new claim_contribution_tokens(origin: OriginFor<T>, project_id: T::ProjectIdentifier) extrinsic.

2. Tests
   todo!()
3. Benchmarks
   todo!()

[joepetrowski]

You might want to be careful, when you go to 0.9.36 you will need to account for paritytech/substrate@a0e00dc.

[joepetrowski]

See the Cumulus companion for how that impacts the pallet config (and how you can still use compact).

[lrazovic]

Following the same reasoning done for pallet-assets paritytech/substrate#12740 The HasCompact and TypeInfo trait bounds on ProjectId have been removed. Compact can be used on the new type ProjectIdParameter.