feat: implement mass balance validation for Story 7.1

- Added port_mass_flows to Component trait and implements for core components.
- Added System::check_mass_balance and integrated it into the solver.
- Restored connect methods for ExpansionValve, Compressor, and Pipe to fix integration tests.
- Updated Python and C bindings for validation errors.
- Updated sprint status and story documentation.

bindings/wasm/package.json

@@ -0,0 +1,42 @@
+{
+  "name": "@entropyk/wasm",
+  "version": "0.1.0",
+  "description": "WebAssembly bindings for the Entropyk thermodynamic simulation library",
+  "keywords": [
+    "thermodynamics",
+    "refrigeration",
+    "simulation",
+    "hvac",
+    "wasm",
+    "webassembly"
+  ],
+  "author": "Sepehr <sepehr@entropyk.com>",
+  "license": "MIT OR Apache-2.0",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/entropyk/entropyk.git",
+    "directory": "bindings/wasm"
+  },
+  "files": [
+    "pkg/entropyk_wasm_bg.wasm",
+    "pkg/entropyk_wasm.js",
+    "pkg/entropyk_wasm.d.ts"
+  ],
+  "main": "pkg/entropyk_wasm.js",
+  "types": "pkg/entropyk_wasm.d.ts",
+  "scripts": {
+    "build": "wasm-pack build --target web --release",
+    "build:node": "wasm-pack build --target nodejs --release",
+    "test": "wasm-pack test --node",
+    "test:browser": "wasm-pack test --headless --chrome",
+    "publish": "wasm-pack publish"
+  },
+  "devDependencies": {},
+  "engines": {
+    "node": ">= 14.0.0"
+  },
+  "browserslist": [
+    "defaults",
+    "not IE 11"
+  ]
+}