Add .prettierrc, .prettierignore; update frontend/package.json scripts

- Root .prettierrc sets tabWidth=4 and proseWrap=always
- Root .prettierignore excludes node_modules, build output, lockfiles
- package.json: adds test (vite build), lint, fmt scripts; adds prettier
  as a devDependency; fixes typos in description and keywords

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.prettierignore

@@ -0,0 +1,6 @@
+node_modules/
+frontend/dist/
+frontend/build/
+backend-go/bin/
+*.lock
+Prompts/

.prettierrc

@@ -0,0 +1,4 @@
+{
+    "tabWidth": 4,
+    "proseWrap": "always"
+}

frontend/package.json

@@ -1,32 +1,36 @@
 {
-  "name": "frontend",
-  "version": "1.0.0",
-  "description": "koin_ping blockchain monoitor UI",
-  "main": "index.js",
-  "scripts": {
-    "dev": "vite",
-    "build": "vite build",
-    "preview": "vite preview"
-  },
-  "keywords": [
-    "cryptocurrency",
-    "blockchain",
-    "blockchain event moitoring"
-  ],
-  "author": "Steven Jannette",
-  "license": "MIT",
-  "type": "module",
-  "dependencies": {
-    "firebase": "^12.7.0",
-    "react": "^19.2.3",
-    "react-dom": "^19.2.3",
-    "react-router-dom": "^7.11.0"
-  },
-  "devDependencies": {
-    "@types/react": "^19.2.7",
-    "@types/react-dom": "^19.2.3",
-    "@vitejs/plugin-react": "^5.1.2",
-    "typescript": "^5.9.3",
-    "vite": "^7.3.0"
-  }
+    "name": "frontend",
+    "version": "1.0.0",
+    "description": "koin_ping blockchain monitor UI",
+    "main": "index.js",
+    "scripts": {
+        "dev": "vite",
+        "build": "vite build",
+        "preview": "vite preview",
+        "test": "vite build",
+        "lint": "prettier --check 'src/**/*.{js,jsx,ts,tsx,css}'",
+        "fmt": "prettier --write 'src/**/*.{js,jsx,ts,tsx,css}'"
+    },
+    "keywords": [
+        "cryptocurrency",
+        "blockchain",
+        "blockchain event monitoring"
+    ],
+    "author": "Steven Jannette",
+    "license": "MIT",
+    "type": "module",
+    "dependencies": {
+        "firebase": "^12.7.0",
+        "react": "^19.2.3",
+        "react-dom": "^19.2.3",
+        "react-router-dom": "^7.11.0"
+    },
+    "devDependencies": {
+        "@types/react": "^19.2.7",
+        "@types/react-dom": "^19.2.3",
+        "@vitejs/plugin-react": "^5.1.2",
+        "prettier": "^3.8.1",
+        "typescript": "^5.9.3",
+        "vite": "^7.3.0"
+    }
 }