Address code review feedback

- Made package-data configuration more specific to langbot package only
- Improved path detection with caching to avoid repeated file I/O
- Removed sys.path searching which was incorrect for package data
- Removed interactive input() call for non-interactive environment compatibility
- Simplified error messages for version check

Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>

pyproject.toml

@@ -112,7 +112,7 @@ packages = { find = {} }
 include-package-data = true
 
 [tool.setuptools.package-data]
-"*" = [
+langbot = [
     "web/out/**/*",
     "templates/**/*",
     "res/**/*",