Add pmtiles support

[slowdub]

Description

Add support for pmtiles.

Type of Pull Request

• Adding a feature
• Fixing a bug
• Maintaining documents
• Others ()

Verify the followings

• Code is up-to-date with the main branch
• No lint errors after pnpm lint
• Make sure all the existing features working well

Refer to CONTRIBUTING.MD for more details.

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[JinIgarashi]

@orthotypos Thanks for PR. The code looks good, but I am not sure it is the best way to use addProtocol inside this plugin. I think this plugin should work with PMTiles if you add protocol in your app. Could you try that?

[slowdub]

@orthotypos Thanks for PR. The code looks good, but I am not sure it is the best way to use addProtocol inside this plugin. I think this plugin should work with PMTiles if you add protocol in your app. Could you try that?

So, my app already has pmtiles support (via addProtocol), but I was getting this error when trying to print:
"url scheme 'pmtiles' is not supported"

But as I was trying now to create a minimally reproducible setup here, I didn't see the issue anymore. So you're right. it must have been some race condition in my app.
I am closing the PR. Thanks @JinIgarashi !