Add glOptions to GraphCanvas to extend gl configutation

[footnoise]

After some internet search, found that to make ability to save/download Canvas as a picture extra configuration should be passed to gl attribute as preserveDrawingBuffer: true. To avoid hardcoded value, decided to make it as configurable parameter on user level.

// If canvas is created like this:
<GraphCanvas glOptions={{ preserveDrawingBuffer: true }}/>


// the following pseudo-code should work
const url = getControls()._domElement?.toDataURL();
const fakeDownloader = document.createElement('a');
fakeDownloader.href = url;
fakeDownloader.download = 'canvas';
fakeDownloader.click();
fakeDownloader.remove();

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[ ] No

Other information

[amcdnl]

Awesome!