Added "abogen-cli" for better error handling.

CHANGELOG.md

@@ -1,3 +1,4 @@
+- Added `abogen-cli` command for better troubleshooting and error handling.
 - Switched from setuptools to hatchling for packaging.
 - Added classifiers to the package metadata.
 - Fixed "No module named 'docopt'" and "setuptools.build_meta" import errors while using .bat installer in Windows, mentioned by @nigelp in https://github.com/denizsafak/abogen/issues/2 

README.md

@@ -133,6 +133,13 @@ Abogen is a standalone project, but it is inspired by and shares some similariti
 - [ ] Add support for kokoro-onnx.
 - [ ] Add dark mode.
 
+# `Troubleshooting`
+If you encounter any issues while running Abogen, try launching it from the command line with:
+```
+abogen-cli
+```
+This will start Abogen in command-line mode and display detailed error messages. Please open a new issue on the [Issues](https://github.com/denizsafak/abogen/issues) page with the error message and a description of your problem.
+
 ## `Contributing`
 I welcome contributions! If you have ideas for new features, improvements, or bug fixes, please fork the repository and submit a pull request.
 ### For developers and contributors