Mybfgs

[19hello]

Reminder

• Have you linked an issue with this pull request?
• Have you added adequate unit tests and/or case tests for your 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 #...

Unit Tests and/or Case Tests for my changes

• A unit test is added for each new feature or bug fix.

What's changed?

• Example: My changes might affect the performance of the application under certain conditions, and I have tested the impact on various scenarios...

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

• Example: I have added a new virtual function in the esolver base class in order to ...

[dyzheng]

Please rewrite the title of this PR, where is this method from?

[dyzheng]

Please raise a issue to describe this method you have implemented, and show some results to prove your code.

[QuantumMisaka]

@19hello Apart from the method description, from the users' side we need test results from your BFGS method, and compare test for old BFGS and ASE BFGS