[PyProject] Spin up an initial pyproject.toml allowing for local pip install

[Jack-Khuu]

This is the first step towards pip-installing of torchchat. Specifically this PR:

• Adds a pyproject.toml based on requirements.txt
• Pulls torch installation instructions from install_requirements.sh into install_torch.sh
  • torch installation will be done separately from pip install

Note that install instructions have not changed pending refactoring the following from install_requirements.sh

(
  set -x
  $PIP_EXECUTABLE install evaluate=="0.4.3" lm-eval=="0.4.7" psutil=="6.0.0"
)

---

Testing:

# Original
./install/install_requirements.sh; pip freeze > original.txt

# New Install Requirements
./install/install_requirements.sh; pip freeze > new.txt

> diff original.txt new.txt 
None

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/torchchat/1527

• 📄 Preview Python docs built from this PR

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As of commit fbe31ff with merge base bf05236 ():
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[zhenyan-zhang-meta]

Awesome work! Left some nit and a question.

[zhenyan-zhang-meta]

nit: can keep the comments as we have in requirements.txt.

[zhenyan-zhang-meta]

nit: keep this?

[Jack-Khuu]

Intentionally dropped the extra index since it's not actually a case that's being used (i.e. difference in version requirements based on pt version)

[zhenyan-zhang-meta]

qq: why do we not need to copy over

torchchat/install/install_requirements.sh

Lines 23 to 33 in 12d1550

	PYTHON_SYS_VERSION="$($PYTHON_EXECUTABLE -c "import sys; print(f'{sys.version_info.major}.{sys.version_info.minor}')")"
	# Check python version. Expect at least 3.10.x
	if ! $PYTHON_EXECUTABLE -c "
	import sys
	if sys.version_info < (3, 10):
	sys.exit(1)
	";
	then
	echo "Python version must be at least 3.10.x. Detected version: $PYTHON_SYS_VERSION"
	exit 1
	fi

here?

[Jack-Khuu]

This version check is actually going to be removed once we move to pyproject (enforces python version), so if anything it will be deleted

[zhenyan-zhang-meta]

LGTM, feel free to merge.