fix: fix website bugs and migrate docSearch

[serena-ruan]

No description provided.

[serena-ruan]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[codecov-commenter]

Codecov Report

Merging #1331 (ed13861) into master (6448dd1) will decrease coverage by 2.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1331      +/-   ##
==========================================
- Coverage   84.77%   82.76%   -2.02%     
==========================================
  Files         286      286              
  Lines       14165    14165              
  Branches      698      698              
==========================================
- Hits        12009    11723     -286     
- Misses       2156     2442     +286     

Impacted Files	Coverage Δ
...m/src/main/scala/com/microsoft/lightgbm/SWIG.scala	0.00% <0.00%> (-100.00%)	⬇️
...azure/synapse/ml/lightgbm/LightGBMClassifier.scala	11.11% <0.00%> (-80.00%)	⬇️
...t/azure/synapse/ml/lightgbm/LightGBMDelegate.scala	0.00% <0.00%> (-50.00%)	⬇️
.../synapse/ml/lightgbm/booster/LightGBMBooster.scala	54.41% <0.00%> (-35.30%)	⬇️
...crosoft/azure/synapse/ml/lightgbm/TrainUtils.scala	58.59% <0.00%> (-27.39%)	⬇️
.../synapse/ml/lightgbm/dataset/LightGBMDataset.scala	42.68% <0.00%> (-20.74%)	⬇️
...osoft/azure/synapse/ml/lightgbm/LightGBMBase.scala	79.77% <0.00%> (-15.17%)	⬇️
...crosoft/azure/synapse/ml/io/http/HTTPClients.scala	58.33% <0.00%> (-15.01%)	⬇️
...azure/synapse/ml/lightgbm/params/TrainParams.scala	87.50% <0.00%> (-12.50%)	⬇️
...zure/synapse/ml/lightgbm/TaskTrainingMethods.scala	87.50% <0.00%> (-12.50%)	⬇️
... and 6 more

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[mhamilton723]

this is commented out