The unit of coordinate in abacus.json is incorrect

[MoseyQAQ]

Describe the bug

The unit of coordinate in abacus.json is actually Bohr:

abacus-develop/source/source_io/module_json/output_info.cpp

Lines 101 to 103 in 5451b70

	coordinateArray.JPushBack(tau[j][0]*lat0);
	coordinateArray.JPushBack(tau[j][1]*lat0);
	coordinateArray.JPushBack(tau[j][2]*lat0);

However, all doucment states that its unit is Angstrom, includes:

1. the header says that "comment": "Unless otherwise specified, the unit of energy is eV and the unit of length is Angstrom",
2. Also in the document related to this item:
   

   abacus-develop/docs/advanced/json/json_para.md

   Line 53 in 5451b70

   - `coordinate` - [array(array(double))] The cartesian coordinates of each atom. Unit in Angstrom.

Expected behavior

The output should be in unit of Angstrom. (or the related document should be corrected)

To Reproduce

No response

Environment

No response

Additional Context

No response

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[mohanchen]

Very good suggestion, we will fix it soon!