feat: initial Minipaste

- MinIO-backed paste storage with 8-char base62 IDs
- Paste expiry (1m, 1h, 1d, 1w, never) stored in object metadata
- Raw plain-text endpoint at /raw/:id
- Syntax highlighting in editor and paste view via highlight.js
- In-editor highlight overlay with live language switching
- Download button with correct file extension per language
- Auto-redirect to paste after creation

package.json

@@ -0,0 +1,18 @@
+{
+  "name": "minipaste",
+  "version": "1.0.0",
+  "description": "A minimal pastebin alternative backed by MinIO",
+  "main": "src/index.js",
+  "scripts": {
+    "start": "node src/index.js",
+    "dev": "node --watch src/index.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "dotenv": "^16.0.0",
+    "express": "^4.21.0",
+    "minio": "^8.0.0"
+  }
+}