feat: support spin for ABACUS (#718)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Enhanced data retrieval capabilities with the inclusion of magnetic
moment and force data in the output.
- Streamlined method for handling parameters in the ABACUS plugin,
improving usability.
- New function added for registering magnetic data types, enhancing
functionality.
- Comprehensive test suite introduced for validating ABACUS spin
simulation functionalities.

- **Bug Fixes**
- Improved control flow to ensure accurate integration of new magnetic
data.

- **Tests**
- Introduced new test cases to validate the accuracy of ABACUS spin
simulation outputs, enhancing overall test coverage.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: root <pxlxingliang>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Han Wang <[email protected]>

Author: 3 people

dpdata/abacus/md.py

@@ -12,6 +12,7 @@
     get_cell,
     get_coords,
     get_geometry_in,
+    get_mag_force,
     kbar2evperang3,
 )
 
@@ -199,6 +200,9 @@ def get_frame(fname):
         stress[iframe] *= np.linalg.det(cells[iframe, :, :].reshape([3, 3]))
     if np.sum(np.abs(stress[0])) < 1e-10:
         stress = None
+
+    magmom, magforce = get_mag_force(outlines)
+
     data = {}
     data["atom_names"] = atom_names
     data["atom_numbs"] = natoms
@@ -213,5 +217,9 @@ def get_frame(fname):
     if not isinstance(data["virials"], np.ndarray):
         del data["virials"]
     data["orig"] = np.zeros(3)
+    if len(magmom) > 0:
+        data["spins"] = magmom
+    if len(magforce) > 0:
+        data["mag_forces"] = magforce
 
     return data

dpdata/abacus/relax.py

@@ -13,6 +13,7 @@
     get_cell,
     get_coords,
     get_geometry_in,
+    get_mag_force,
     kbar2evperang3,
 )
 
@@ -198,6 +199,8 @@ def get_frame(fname):
         lines, atomnumber
     )
 
+    magmom, magforce = get_mag_force(lines)
+
     data = {}
     data["atom_names"] = atom_names
     data["atom_numbs"] = natoms
@@ -211,4 +214,9 @@ def get_frame(fname):
     data["stress"] = stress
     data["orig"] = np.zeros(3)
 
+    if len(magmom) > 0:
+        data["spins"] = magmom
+    if len(magforce) > 0:
+        data["mag_forces"] = magforce
+
     return data