Remove use of __file__ to support pyoxidizer

[JPHutchins]

First Check

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Example Code

import typer

def main():
    raise Exception

typer.run(main)

Description

The exception hook in typer.main will cause problems for pyoxidizer due to use of __file__.

typer/typer/main.py

Lines 67 to 68 in 3a7264c

	typer_path = os.path.dirname(__file__)
	click_path = os.path.dirname(click.__file__)

pyoxidizer has some guidance on updating to compliant APIs: https://pyoxidizer.readthedocs.io/en/v0.10.3/oxidized_importer_resource_files.html?highlight=__file__#porting-code-to-modern-resources-apis

Operating System

Other

Operating System Details

This will impact all OS.

Typer Version

0.9.0

Python Version

3.12

Additional Context

Link to pyoxidizer issue: indygreg/PyOxidizer#69