Add README

Author: kyleconroy

README.md

@@ -0,0 +1,21 @@
+## Usage
+
+```yaml
+version: '2'
+plugins:
+- name: py
+  wasm:
+    url: https://github.com/tabbed/sqlc-gen-python/releases/download/v0.16.0-alpha/sqlc-gen-python.wasm
+    sha256: 4fb54ee7d25b4d909b59a8271ebee60ad76ff17b10d61632a5ca5651e4bfe438
+sql:
+- schema: "schema.sql"
+  queries: "query.sql"
+  engine: postgresql
+  codegen:
+  - out: src/authors
+    plugin: py
+    options:
+      package: authors
+      emit_sync_querier: true
+      emit_async_querier: true
+```