Optimizing eigenvalue parsing in ABACUS calculation

### Background

Should support both scf and nscf output. Currently, it only reads the running_scf.log file. It needs to be fixed.

### Describe the solution you'd like

Support parsing the nscf output also.

### Additional Context

_No response_

Start by locating the code that parses running_scf.log and trace how eigenvalues are extracted from ABACUS output. Compare the existing scf path with the nscf output format; done means eigenvalues are parsed correctly from both outputs, with relevant tests or sample outputs run if available.

Written by the indexing model from the issue text.