Initial project setup: Rust/WASM solar system simulator with SvelteKit frontend

- Rust workspace with 4 crates: orbital-mechanics, mass-driver-core, mass-driver-wasm, mass-driver-backend
- Keplerian orbital mechanics engine with JPL elements for 14 bodies (Sun, 8 planets, Pluto, Ceres, Europa, Titan, Ganymede)
- Kepler equation solver and orbital position computation compiled to WASM
- SvelteKit frontend with Tailwind CSS, Canvas2D renderer showing animated solar system
- Orbit ellipses, planet dots with labels, Sun glow, grid, scale bar, pan/zoom controls
- Time controls (play/pause, 5 speed levels, date picker) driving live simulation
- 2D/3D view toggle (3D placeholder for Threlte integration)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/package.json

@@ -0,0 +1,37 @@
+{
+	"name": "frontend",
+	"private": true,
+	"version": "0.0.1",
+	"type": "module",
+	"scripts": {
+		"dev": "vite dev",
+		"build": "vite build",
+		"preview": "vite preview",
+		"prepare": "svelte-kit sync || echo ''",
+		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
+		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch"
+	},
+	"devDependencies": {
+		"@sveltejs/adapter-auto": "^7.0.0",
+		"@sveltejs/kit": "^2.50.2",
+		"@sveltejs/vite-plugin-svelte": "^6.2.4",
+		"@tailwindcss/vite": "^4.2.2",
+		"@types/three": "^0.183.1",
+		"svelte": "^5.54.0",
+		"svelte-check": "^4.4.2",
+		"tailwindcss": "^4.2.2",
+		"typescript": "^5.9.3",
+		"vite": "^7.3.1"
+	},
+	"dependencies": {
+		"mass-driver-wasm": "file:../crates/mass-driver-wasm/pkg",
+		"@threlte/core": "^8.5.8",
+		"@threlte/extras": "^9.14.5",
+		"@threlte/flex": "^2.2.2",
+		"astronomy-engine": "^2.1.19",
+		"postprocessing": "^6.39.0",
+		"three": "^0.183.2",
+		"vite-plugin-top-level-await": "^1.6.0",
+		"vite-plugin-wasm": "^3.6.0"
+	}
+}