feat: support btc psbt

[fbwoolf]

This PR adds a psbtRequest method to the StacksProvider.

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🦋 Changeset detected

Latest commit: 854a4f199bfd315ca5b45a2d603ededb0ceab5e3

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

| Name | Type | | --------------------- | ----- | | @stacks/connect-react | Major | | @stacks/connect | Minor |

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Name	Status	Preview	Comments	Updated
connect-docs	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Mar 9, 2023 at 6:16PM (UTC)

[markmhendrickson]

In support of https://github.com/hirosystems/stacks-wallet-web/issues/3310

cc @aulneau @yknl

[fbwoolf]

@janniks I have forgotten the preferred way to work with the Connect repo, what is the best way to make this branch/pr available for others to test via npm rather than yalc locally?

[janniks]

The PRs are automatically released under an alpha version to npm, make sure to use --save-exact when installing since sometimes versions can conflict.

[fbwoolf]

@janniks @kyranjamie hoping to get an approval to merge this today if possible?