feat: `pallet-loan-intents`

[mustermeiszer]

Description

The pallet-loan-intents deals with signaling repayment intents of assets, that can later be resolved automatically by a bot.

The main use-case is described below.

• Issuer has funds in the bank and wants to move them onchain
• Issuer triggers a RepayIntent on Centrifuge chain - setting a permanent default MUST be possible
  • Intents can ONLY be set with Permission::Borrower for said asset
• Issuer sends funds to dedicated account on Centrifuge chain that is constant, uniquely derived by PalletId, PoolId, LoanId
• After funds arrive in the account, ANYBODY can call fn resolve_intent which repays from the dedicated account to the respective asset

Full Spec

Research/based on

• Single tx workflow needs for app

What are foreseen obstacles or hurdles to overcome?

• None