Add a read-only flag to indicate if the current canvas is Web GL#5844

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spikyMalkallam:Add-a-flag-to-indicate-if-the-most-recently-created-canvas-is-3DspikyMalkallam/p5.js:Add-a-flag-to-indicate-if-the-most-recently-created-canvas-is-3DCopy head branch name to clipboard