Convert canvas-extract to TypeScript

[Zyie]

Description of change

Nice and simple!

[bigtimebuddy]

I actually think your instincts were right about the GlobalMixins, however, I think we need them to define CanvasRender plugins and Renderer plugins.

Currently, this is defined pretty loosely here: https://github.com/pixijs/pixi.js/blob/dev/packages/core/src/AbstractRenderer.ts#L36-L39

That means users don't get typings for doing things like renderer.plugins.extract.canvas().

We should do this as a follow-up fix for all the plugins.

[ivanpopelyshev]

plugins can be moved to GlobalMixins in separate PR , this PR is fine as it is. circular type deps? we have them anyway, we can fix stuff a bit later.

[bigtimebuddy]

@Zyie can remove CanvasExtract from the CanvasRenderer? Otherwise this is good to go

[codecov-io]

Codecov Report

Merging #6503 into dev will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev    #6503   +/-   ##
=======================================
  Coverage   82.34%   82.34%           
=======================================
  Files          38       38           
  Lines        1903     1903           
=======================================
  Hits         1567     1567           
  Misses        336      336           

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[bigtimebuddy]

I've deprecated CanvasRenderer#extract as part of this PR. This is an anti-pattern with the rest of the Renderer plugins, which hang off the plugins object.