feat(math): add blueprint nodes for math library (#442)

* feat(math): add blueprint nodes for math library

- Add Vector2 blueprint nodes (Make, Break, arithmetic, Length, Normalize, Dot, Cross, Distance, Lerp, Rotate, FromAngle)
- Add Fixed32 blueprint nodes (conversions, arithmetic, math functions, comparison)
- Add FixedVector2 blueprint nodes (Make, Break, arithmetic, vector operations)
- Add Color blueprint nodes (Make, Break, conversions, color manipulation, constants)
- Add documentation with visual examples for all math blueprint nodes
- Update sidebar navigation to include math module

* fix(ci): adjust build order - blueprint before math

math package now depends on blueprint, so blueprint must be built first

docs/astro.config.mjs

@@ -247,6 +247,14 @@ export default defineConfig({
                 { label: '实际示例', slug: 'modules/blueprint/examples', translations: { en: 'Examples' } },
               ],
             },
+            {
+              label: '数学库',
+              translations: { en: 'Math' },
+              items: [
+                { label: '概述', slug: 'modules/math', translations: { en: 'Overview' } },
+                { label: '蓝图节点', slug: 'modules/math/blueprint-nodes', translations: { en: 'Blueprint Nodes' } },
+              ],
+            },
             {
               label: '程序生成',
               translations: { en: 'Procgen' },