Add 'Create Foundry' how-to

[Dr-Electron]

Description of change

Created a how to to create a L1 foundry on L2.

Links to any relevant issues

Fixes #1460.

Type of change

• Documentation Enhancement

Change checklist

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own changes
• I have made sure that added/changed links still work

[Dr-Electron]

Preview: https://iota-wiki-qn8ptubq0-iota1.vercel.app/

[github-actions]

This pull request has been deployed to Vercel.

Latest commit: 1d1cfdb

✅ Preview: https://iota-wiki-2rofcicsy-iota1.vercel.app

[Dr-Electron]

Btw I think I will change my how tos for tokens:
Instead of hardcoding the allowance assets I will make it payable and add a check > 0 for base tokens with a warning that says please fund storage deposit.
Later on the check should check for estimated storage deposit I guess.

Then I can add an admonition that you might want to work with allow or ownable functions depending on your use case wdyt?

[Dr-Electron]

Updated the docs and contract. Not sure what I think about the admonitions and their placement yet 😅