Initial commit: OTA chunk transfer protocol implementation

- Protocol definition with 6-byte header (chunk_idx: 2B, payload: N B, crc32: 4B)
- Node.js server with chunk-based HTTP delivery
- C client library with resumable download support
- CRC32 implementation (IEEE 802.3)
- Test suites for both server and CRC32
- 1024B default chunk size (0.59% overhead)

package.json

@@ -0,0 +1,13 @@
+{
+  "name": "ota-chunk-transfer",
+  "version": "0.1.0",
+  "description": "Resume-capable chunk transfer protocol for OTA updates",
+  "main": "server/server.js",
+  "scripts": {
+    "start": "node server/server.js",
+    "test": "node tests/test_server.js"
+  },
+  "keywords": ["ota", "chunk", "transfer", "resume"],
+  "author": "",
+  "license": "MIT"
+}