fix: include jinja prompt templates in package artifacts (#85)

Author: gaodan-fang

MANIFEST.in

@@ -0,0 +1 @@
+recursive-include kaizen *.jinja2

pyproject.toml

@@ -58,6 +58,9 @@ where = ["."]
 exclude = ["explorations*"]
 include = ["kaizen*"]
 
+[tool.setuptools.package-data]
+kaizen = ["**/*.jinja2"]
+
 [tool.uv]
 package = true