add documentation to precise mode

[MahmoudAshraf97]

PR Description

This PR adds documentation to Precision mode to datatypes deepdive
it is still missing some code examples but I don't know if they are needed

[github-actions]

Thanks for contributing to Ivy! 😊👏
Here are some of the important points from our Contributing Guidelines 📝:
1. Feel free to ignore the run_tests (1), run_tests (2), … jobs, and only look at the display_test_results job. 👀 It contains the following two sections:
- Combined Test Results: This shows the results of all the ivy tests that ran on the PR. ✔️
- New Failures Introduced: This lists the tests that are passing on main, but fail on the PR Fork. Please try to make sure that there are no such tests. 💪
2. The lint / Check formatting / check-formatting tests check for the formatting of your code. 📜 If it fails, please check the exact error message in the logs and fix the same. ⚠️🔧
3. Finally, the test-docstrings / run-docstring-tests check for the changes made in docstrings of the functions. This may be skipped, as well. 📚
Happy coding! 🎉👨‍💻

[KareemMAX]

@MahmoudAshraf97,
LGTM overall, I've left some comments that I want to know what do you think about them. I guess we also may need to add some examples, I guess one example for precise mode and one for non-precise would be enough

[KareemMAX]

LGTM!