Enhance PanAndZoom with touch support for pinch zoom and single-finger pan

[sago35]

#20

This PR adds touch support.
It's a minimal implementation, but it allows for comfortable use of KiCanvas from platforms like Android.

See https://twitter.com/i/status/1739613481052307890

[sago35]

I have confirmed that touch support works in the following environments:

• Android
• iPhone
• Windows 11 + TouchScreen

[theacodes]

Looks like lint is failing, do you mind giving that a look?

[sago35]

I have fixed the issue. However, it seems that the following warning still exists. I have not corrected this warning, but I can do so if needed.

$ npm run lint:prettier

> kicanvas@0.0.0 lint:prettier
> prettier . --check

Checking formatting...
[warn] src/kicanvas/elements/kc-board/properties-panel.ts
[warn] src/kicanvas/elements/kc-schematic/properties-panel.ts
[warn] Code style issues found in 2 files. Run Prettier to fix.

[sago35]

@theacodes
Can you run the CI first?

[theacodes]

Looks good. Any thing else before I merge? :)

[sago35]

@theacodes
It's fine to merge as it is. Thank you for checking.