Adds implementation for canvas `transform` function
https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/transform

Add `fontBoundingBoxAscent` and `fontBoundingBoxDescent` to textMetrics

- Adds bindings for setting and getting `letterSpacing`
https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/letterSpacing
- Adds implementation for setter and getter

…nto CanvasTest

Co-authored-by: Ryan Tremblay <[email protected]>

…bylonNative into CanvasTest

- `lineCap`
https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineCap
- `lineJoin`
https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineJoin
- `miterLimit`
https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/miterLimit

---------

Co-authored-by: Cedric Guillemet <[email protected]>

Gradient / color stop glue code and small example.


![image](https://github.com/user-attachments/assets/e8f54174-3887-40e9-a4a8-48a6f41a1b92)

… into CanvasTest

# Conflicts:
#	Polyfills/Canvas/Source/Context.cpp

- https://developer.mozilla.org/en-US/docs/Web/API/Path2D

Adds nanosvg.h for SVG path parsing.
Known missing functionality:
1. `addPath` doesn't accept DOMMatrix transform
2. `roundRect` doesn't accept CSS-style radii array
3. `ellipse` doesn't handle clockwise

Called from BabylonJS/Babylon.js#16221

…nto CanvasTest

-
https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/getTransform
-
https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/setTransform
-
https://developer.mozilla.org/en-US/docs/Web/API/Path2D/addPath#transform

usage:
```
// Path 2D
let path = new _native.Path2D();
let path2 = new _native.Path2D("M 10,30 A 20, 20 0, 0, 1 50, 30 A 20, 20 0, 0, 1 90, 30 Q 90, 60 50, 90 Q 10, 60 10, 30 z");
path.addPath(path2, { a: 1, b: 0, c: 0, d: 1, e: 400, f: 0 }); // shift right 400
context.stroke(path);
```

…nto CanvasTest

… into CanvasTest

https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/roundRect
Known Issues:
- clipping round rect does not have rounded corners

Co-authored-by: Cedric Guillemet <[email protected]>

Small PR just so later PRs that require modifying nanovg have proper
diffs

- allow NVGPaint to have 2 images (onlye used when text is mixed with
gradient)
- shader update


![image](https://github.com/user-attachments/assets/c0652079-5d45-49c8-acc6-1432c7928c46)

I'll need someone to generate the HSSL shader for me since I'm on Mac.
Currently doesn't support blurred text but can add that in a future PR.

---------

Co-authored-by: Cedric Guillemet <[email protected]>

- Adds example Path2D usage in experience.js.
- Makes Path2D work with .fill as well

![image](https://github.com/user-attachments/assets/18aef1c2-ea8e-48c6-b175-1c1e31e2c0d3)

---------

Co-authored-by: Cedric Guillemet <[email protected]>

Co-authored-by: Gary Hsu <[email protected]>