endpoints: add patreon endpoint

[ghostdevv]

Adds the patreon endpoints from their documentation. I've tested these thoroughly whilst making a pr to pocketbase (pocketbase/pocketbase#3323).

There was a PR for this already #460 but it's 2 years old and outdated unfortunately

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[ghostdevv]

Signed CLA

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Patch Set 1:

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Patch Set 1:

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Patch Set 2:

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Patch Set 2: Code-Review+1 Run-TryBot+1

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Patch Set 2: TryBot-Result+1

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[ghostdevv]

Bump 🙏