Add User Guides/Stories - Asset Hub

[DrW3RK]

Asset-related user stories for parachain and wallet developers. Create guides on:

• How to create and manage a foreign asset
•  How to pay fees using assets

With Rust/TS examples for both.

[the-right-joyce]

hey Radha, did you already find the time to progress with "How to pay fees using assets"?
The feedback form shows that users are unaware of the functionality and how to use it (see user story 4 and 7)

[Polkadot-Forum]

This issue has been mentioned on Polkadot Forum. There might be relevant details there:

https://forum.polkadot.network/t/asset-hub-brainstorming-session-call-notes-and-discussion-continuation/7260/10

[IkerAlus]

Linking these two here for reference:

• Paying Transaction Fees with the Asset Conversion Pallet using Polkadot-JS

• Paying Transaction Fees with the Asset Conversion Pallet using Subxt

They may be useful.