feat(command): show help message

[bladehan1]

What does this PR do?
show help information in groups
Why are these changes required?
help command is standard
This PR has been tested by:

• Unit Tests
• Manual Testing

Follow up

Extra details

[codecov-commenter]

Codecov Report

Merging #4606 (f827359) into develop (58f5e0b) will decrease coverage by 0.06%.
The diff coverage is 4.28%.

@@              Coverage Diff              @@
##             develop    #4606      +/-   ##
=============================================
- Coverage      54.43%   54.36%   -0.07%     
- Complexity      7969     7970       +1     
=============================================
  Files            831      831              
  Lines          47088    47154      +66     
  Branches        5098     5106       +8     
=============================================
+ Hits           25634    25637       +3     
- Misses         19424    19486      +62     
- Partials        2030     2031       +1     

Impacted Files	Coverage Δ
.../src/main/java/org/tron/core/config/args/Args.java	63.05% <0.00%> (-4.60%)	⬇️
...ework/src/main/java/org/tron/program/FullNode.java	2.70% <0.00%> (-0.08%)	⬇️
...ava/org/tron/common/parameter/CommonParameter.java	57.23% <100.00%> (ø)
...g/tron/core/exception/DupTransactionException.java	0.00% <0.00%> (-66.67%)	⬇️
...mon/overlay/discover/table/DistanceComparator.java	80.00% <0.00%> (-20.00%)	⬇️
...mework/src/main/java/org/tron/core/db/Manager.java	55.36% <0.00%> (+0.07%)	⬆️
...java/org/tron/core/capsule/TransactionCapsule.java	50.85% <0.00%> (+0.24%)	⬆️
...src/main/java/org/tron/core/db/PendingManager.java	51.16% <0.00%> (+16.27%)	⬆️

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[arslan-raza-143]

@bladehan1