add the deepmodeling banner to doc

[njzjz]

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[codecov-commenter]

Codecov Report

Merging #254 (a4675d1) into devel (3edbc24) will increase coverage by 0.10%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##            devel     #254      +/-   ##
==========================================
+ Coverage   81.99%   82.09%   +0.10%     
==========================================
  Files          59       60       +1     
  Lines        5120     5150      +30     
==========================================
+ Hits         4198     4228      +30     
  Misses        922      922              

Impacted Files	Coverage Δ
dpdata/vasp/outcar.py	96.39% <100.00%> (+0.13%)	⬆️
dpdata/system.py	80.06% <0.00%> (-0.85%)	⬇️
dpdata/plugins/vasp.py	100.00% <0.00%> (ø)
dpdata/utils.py	100.00% <0.00%> (ø)

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