Feature: release numerically stable QO with handson manual in tools/qo/

[kirk0830]

Brief pre

ABACUS LCAO2QO hands-on manual.pdf

Reminder

• Have you linked an issue with this pull request?
• Have you noticed possible changes of behavior below or in the linked issue?
• Have you explained the changes of codes in core modules of ESolver, HSolver, ElecState, Hamilt, Operator or Psi? (ignore if not applicable)

Linked Issue

Fix #3640

What's changed?

• Solve the numerical instability problem.

Any changes of core modules? (ignore if not applicable)

• No

[WHUweiqingzhou]

Congratulations!
I think current QO module is useful and ready for applications. Thanks for your efforts. I also think you provide a good example for features that require long-term development, and show us how to represent the results to community.