feat: add distance value object and ci workflows

client/package.json

@@ -7,6 +7,7 @@
     "dev": "vite",
     "build": "tsc -b && vite build",
     "lint": "eslint .",
+    "typecheck": "tsc --noEmit",
     "preview": "vite preview"
   },
   "dependencies": {
@@ -31,6 +32,8 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.36.0",
+    "@typescript-eslint/eslint-plugin": "^8.24.0",
+    "@typescript-eslint/parser": "^8.24.0",
     "@types/leaflet": "^1.9.12",
     "@types/node": "^24.6.0",
     "@types/react": "^19.1.16",
@@ -39,10 +42,16 @@
     "autoprefixer": "^10.4.21",
     "babel-plugin-react-compiler": "^19.1.0-rc.3",
     "eslint": "^9.36.0",
+    "eslint-import-resolver-typescript": "^3.7.0",
+    "eslint-plugin-import": "^2.31.0",
+    "eslint-plugin-prettier": "^5.2.1",
+    "eslint-plugin-react": "^7.37.2",
     "eslint-plugin-react-hooks": "^5.2.0",
     "eslint-plugin-react-refresh": "^0.4.22",
+    "eslint-plugin-unused-imports": "^4.1.4",
     "globals": "^16.4.0",
     "postcss": "^8.5.6",
+    "prettier": "^3.4.2",
     "tailwindcss": "^3.4.17",
     "tailwindcss-animate": "^1.0.7",
     "typescript": "~5.9.3",