Feature/296-pinch-and-zoom

[brett-estabrook]

I would say PR #291 is a prequisite for this.

This is my initial pull request for pinch and zoom. I believe it is feature complete at this point.

When testing I recommend setting the following to true to enable Pinch and Zoom on all charts: https://github.com/microcharts-dotnet/Microcharts/blob/f6fd13a5104b97ed9898b905882dd29255f8502c/Sources/Microcharts/Charts/AxisBasedChart.cs#L136

Charts tested:

• [x] Bar
• [x] Point
• [x] Line
• [x] Donut
• [x] Radar

Platform tested :

• [ ] Android
• [x] iOS
• [ ] MacOS
• [ ] Windows

Fix:

• #296
• #295

[andrveld]

Are there plans for this to be merged soon?

[eman1986]

I was trying to let another person on the team review this first, but I may just merge it in soon.