refactor: use Jinja2 templating for shell command generation

- Replace manual string concatenation with Jinja2 templates
- Centralize package manager config in _PM_CONFIG dict
- Pre-compile templates for better performance
- Add jinja2>=3.1.0 dependency

Reduces template logic code from ~240 lines to ~88 lines while
maintaining full API compatibility and all existing tests passing.

Author: xz-dev

pyproject.toml

@@ -27,6 +27,7 @@ classifiers = [
 dependencies = [
     "platformdirs>=4.0.0",
     "rich>=13.0.0",
+    "jinja2>=3.1.0",
 ]
 
 [project.urls]