chore: add docs on DNS-based transfer whitelist

[colinmcdonald22]

Overview

Description:
This PR adds a section to the transfer packet page regarding how DNS-based whitelisting, and the auto-accept system, works.

Link to the page: https://7f6b3843.lunarclient-dev.pages.dev/apollo/developers/modules/transfer

Changes:
N/A

Code Example (If applicable):
N/A

Related Issue (If applicable):
Was discussed in developer Discord.

Screenshots and/or Videos (If applicable):

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Review Request Checklist

• Your code follows the style guidelines of this project.
• I have performed a self-review of my code.
• I have tested this change myself. (If applicable)
• I have made corresponding changes to the documentation. (If applicable)
• The branch name follows the projects naming conventions. (e.g. feature/add-module & bugfix/fix-issue)

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