First-party SVG support

[nicoburns]

This issues tracks a first-party SVG implementation in blitz-dom and blitz-paint.

Tasks

• Enable SVG CSS properties in Stylo (this PR Enable basic SVG-related CSS properties for Servo servo/stylo#383 enables some of them)
• Synthesize the CSS properties in the synthesize_presentational_hints_for_legacy_attributes https://github.com/DioxusLabs/blitz/blob/main/packages/blitz-dom/src/stylo.rs#L790 (like this PR does for Servo https://github.com/servo/servo/pull/45405/changes#diff-0c9e01a4915e7f3fa1e348d9047ffc3b145d41a4661d1f6b9211407aa8d59017R268)
• Stop parsing inline SVGs with usvg here: https://github.com/DioxusLabs/blitz/blob/main/packages/blitz-dom/src/layout/construct.rs#L131. Instead we will likely want a custom processing pass, but you may be able to skip this for the initial implementation. (perhaps we could feature flag this at first so that people can choose between resvg and the first-party impl)
• Add SVG rendering support to blitz-paint. This will likely work very similarly to anyrender_svg (https://github.com/DioxusLabs/anyrender/blob/main/crates/anyrender_svg/src/render.rs) but reading from the Blitz DOM and Stylo types rather than usvg types.

SVG Elements

• Core
  • <svg>
  • <g>,
• Reuse
  • <defs>
  • <symbol>
  • <use>
• Shapes
  • <rect>
  • <circle>
  • <ellipse>
  • <line>
  • <polygon>
  • <polyline>
  • <path>
• Paint servers
  • <linearGradient>
  • <radialGradient>
  • <pattern>
  • <marker>
• Clipping and Masking
  • <clipPath>
  • <mask>
• Text
  • <textPath>
  • <text>
  • <tspan>
• <filter> (and subelements)
• Other
  • <foreignObject>
  • <view>