fix(packaging): Correctly exclude the unwanted sub/modules

- "test" installed "test/efuse_scripts/*py"
- "docs" installed "docs/en/conf.py"
- "flasher_stub" no longer exists

pyproject.toml

@@ -69,7 +69,7 @@
     "*" = ["esptool/targets/stub_flasher/1/*", "esptool/targets/stub_flasher/2/*"]
 
 [tool.setuptools.packages]
-    find = {exclude = ["ci", "flasher_stub", "test", "docs"]}
+    find = {exclude = ["ci", "test*", "docs*"]}
 
 [tool.setuptools.dynamic]
     version = {attr = "esptool.__init__.__version__"}