refactor: switch to dynamic versioning in package configuration (#19019)

Signed-off-by: -LAN- <laipz8200@outlook.com>

api/pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "dify-api"
-version = "1.3.1"
+dynamic = ["version"]
 requires-python = ">=3.11,<3.13"
 
 dependencies = [
@@ -89,8 +89,12 @@ dependencies = [
 # Before adding new dependency, consider place it in
 # alphabet order (a-z) and suitable group.
 
+[tool.setuptools]
+packages = []
+
 [tool.uv]
 default-groups = ["storage", "tools", "vdb"]
+package = false
 
 [dependency-groups]