Fix tests to run from anywhere

[samer-hamood]

Fixed tests failing (to find test files) when running from the IDE or the terminal when not in the project root directory.

This was achieved by adding a reference to the project root directory to the path of referenced files:

project_root = Path(__file__).parent.parent.parent.absolute()

Tested with Python 3.13.

From the IDE

Tested with PyCharm 2024.3.1.1 (Community Edition).

From Command Line

Running poetry run pytest from project root directory passes but fails from other directories:

E.g 1: from PyFunctional/functional

PyFunctional/functional:>   poetry run pytest
 ...
 E       FileNotFoundError: [Errno 2] No such file or directory: 'functional/test/data/test.jsonl.xz'
 ...

E.g 2: from PyFunctional/functional/test

PyFunctional/functional/test:>   poetry run pytest
...
FAILED test_streams.py::TestParallelStreams::test_to_csv_compressed - FileNotFoundError: [Errno 2] No such file or directory: 'functional/test/data/tmp/output.txt'
...

[samer-hamood]

The build (3.8) needs to be bypassed on all PRs 😭