Add wallet provider integration guide

[jimobrien]

Summary

• create a guide for integrating wallet providers with Boost Protocol

Testing

• pnpm lint (fails: unable to fetch pnpm)
• pnpm test (fails: unable to fetch pnpm)

[changeset-bot]

⚠️ No Changeset found

Latest commit: 3ed3132

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.

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

💥 An error occurred when fetching the changed packages and changesets in this PR

Some errors occurred when validating the changesets config:
The package or glob expression "@boostxyz/test" is specified in the `ignore` option but it is not found in the project. You may have misspelled the package name or provided an invalid glob expression. Note that glob expressions must be defined according to https://www.npmjs.com/package/micromatch.

[sammccord]

	Fails
🚫	Your PR body must reference a Github issue using a valid keyword, or your PR title must include the internal Boost ticket number, ie: [BOOST-1234] Innovate like nuts

	Warnings
⚠️	Are you sure you want to be submitting a change without including a changeset? If you're just changing docs or tests, you probably don't need to. See the publishing section of the README for more info.

Generated by 🚫 dangerJS against 3ed3132