BUG- Update required python version in Pipfile

[anunayasri]

Description
Taipy required python version >= 3.8 but Pipfile mentions required python_version as 3. It should be >=3.8.
I was setting up the codebase in my local and the setup broker due to this. I am trying to use pdm for managing dependencies. pipenv is too slow on my system.

How to reproduce

brew install pdm
cd $PROJECT_ROOT
pdm install

Error -

❯ pdm install
Lock file does not exist
Updating the lock file...
🔒 Lock failed
Unable to find a resolution because the following dependencies don't work on all Python versions in the
range of the project's `requires-python`: >=3.6.
  python>=3.7 (from <Candidate apispec@6.3.0 from https://pypi.org/simple/apispec/>)
A possible solution is to change the value of `requires-python` in pyproject.toml to >=3.7.
See /var/folders/d7/dtz_zy9d30l96qxg2qzvv5nm0000gn/T/pdm-lock-st285xoy.log for detailed debug log.
[ResolutionImpossible]: Unable to find a resolution

Runtime environment
Please specify relevant indications.

• Taipy version (or branch name): develop branch
• OS: macOS Monterey

Acceptance Criteria

• Ensure local setup works with the python_version change
• Ensure automated tests work fine with this change