add package: pyproject + src (DPYWebhooks, store protocol, cap + self-heal, fail-loud)

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

pyproject.toml

@@ -0,0 +1,15 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "dpy_webhooks"
+version = "0.1.0"
+description = "Per-channel Discord webhook management for discord.py — get-or-create, persist, enforce the cap, send. Config-free, injectable, installable."
+requires-python = ">=3.10"
+dependencies = [
+    "discord.py>=2.2",
+]
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/dpy_webhooks"]