Update the Snaps README to include RPC documentation

[LindaOrtega]

… snaps repo

Add RPC documentation to Snaps README

Short description:
Restructure the README of the snaps library to provide more information on what RPC methods are available with MetaMask Snap and how to use them.

Besides some minor re-structuring and re-wording, this content was copied over from another repository and was originally created by @nillo.

Test scenarios

• Tested that the links worked correctly

[changeset-bot]

⚠️ No Changeset found

Latest commit: 156fc16

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

7 Skipped Deployments

Name	Status	Preview	Comments	Updated (UTC)
alpha-docs	⬜️ Ignored (Inspect)	Visit Preview	💬 Add feedback	Oct 7, 2024 8:25pm
dev-wallet	⬜️ Skipped (Inspect)			Oct 7, 2024 8:25pm
explorer	⬜️ Skipped (Inspect)			Oct 7, 2024 8:25pm
kode-ui	⬜️ Skipped (Inspect)			Oct 7, 2024 8:25pm
marmalade-marketplace	⬜️ Skipped (Inspect)			Oct 7, 2024 8:25pm
proof-of-us	⬜️ Skipped (Inspect)			Oct 7, 2024 8:25pm
tools	⬜️ Skipped (Inspect)			Oct 7, 2024 8:25pm

[LindaOrtega]

I wasn't sure where to fine a more permanent documentation link for ICommandPayload.

I derived that the expected request type was this from the following areas of the code:

• kadena.js/packages/libs/snap/src/services/signTransaction.ts

  Line 53 in f883015

  txn = JSON.parse(transaction);

• kadena.js/packages/libs/snap/src/services/signTransaction.ts

  Line 75 in f883015

  const signerEntries = getSignerEntries(txn, publicKey);

• kadena.js/packages/libs/snap/src/services/signTransaction.ts

  Line 22 in f883015

  txnRequest: ICommandPayload,

But would appreciate it if someone else could verify as well.

[javadkh2]

as we discussed, IPactCommand is more current