add package: pyproject + src

AioKV: async file-backed key-value store for single-process local state
(persist-forever, not a cache — no TTL/eviction). atomic writes via
temp-file + os.replace, every read and write under one asyncio.Lock,
blocking fs calls off the loop via asyncio.to_thread. set(key) defaults
to int(time.time()) for seen/did-X-at-T. aiocache alias kept for
back-compat. src/ layout, hatchling, aiofiles dep.

Signed-off-by: disqualifier <dev@disqualifier.me>

pyproject.toml

@@ -0,0 +1,15 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "aiokv"
+version = "0.1.0"
+description = "Async file-backed key-value store for single-process local state — atomic writes, no TTL, config-free, installable."
+requires-python = ">=3.10"
+dependencies = [
+    "aiofiles>=23.0",
+]
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/aiokv"]