Feature/doc#986 - Document best practice on main script

[trgiangdo]

Resolves Avaiga/taipy-doc#986

Please review the example in the README.md since it can be important.

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
19166	16263	85%	0%	🟢

New Files

No new covered files...

Modified Files

File	Coverage	Status
taipy/core/data/data_node.py	99%	🟢
taipy/core/notification/core_event_consumer.py	96%	🟢
taipy/core/scenario/scenario.py	96%	🟢
taipy/core/sequence/sequence.py	99%	🟢
taipy/core/submission/submission.py	95%	🟢
taipy/core/task/task.py	97%	🟢
taipy/gui/init.py	100%	🟢
taipy/gui/builder/page.py	70%	🟢
taipy/rest/api/resources/cycle.py	100%	🟢
taipy/rest/api/resources/datanode.py	96%	🟢
taipy/rest/api/resources/scenario.py	100%	🟢
TOTAL	95%	🟢

updated for commit: f04f6c4 by action🐍

[jrobinAV]

Looks good to me.

I just need @fabien to approve it before merging anything.

[github-actions]

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