feat: add the examples of contract sync-deploy and async-deploy

[ghost]

Warnings are found on analyzing the commit af890c7.

1 warning:

• ⚠️ Goodcheck

We recommend to address them as possible, for example, update outdated dependencies, fix the tool's configuration, configure sider.yml, turn off unused tools, and so on.

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[codecov-commenter]

Codecov Report

Merging #69 into develop will decrease coverage by 0.22%. The diff coverage is 40.00%.

@@             Coverage Diff             @@
##           develop      #69      +/-   ##
===========================================
- Coverage    51.45%   51.23%   -0.23%     
===========================================
  Files           27       27              
  Lines         2550     2600      +50     
===========================================
+ Hits          1312     1332      +20     
- Misses        1020     1043      +23     
- Partials       218      225       +7     

Impacted Files	Coverage Δ
precompiled/crud/crud.go	35.71% <33.33%> (-0.54%)	:arrow_down:
precompiled/crud/table_factory.go	20.40% <33.33%> (+1.80%)	:arrow_up:
precompiled/crud/crud_service.go	49.23% <46.15%> (-0.77%)	:arrow_down:

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[fisco-dev]

Here is an overview of what got changed by this pull request:

Complexity increasing per file
==============================
- examples/KVTableTest.go  10
- precompiled/crud/crud_service_test.go  4
- examples/kvtable_test_async/main.go  8
- examples/kvtable_test_sync/main.go  8

Clones added
============
- precompiled/crud/crud.go  6
- precompiled/crud/crud_service.go  6
- precompiled/crud/table_factory.go  2
- examples/KVTableTest.go  13
- precompiled/crud/crud_service_test.go  12
- examples/kvtable_test_async/main.go  5
- examples/kvtable_test_sync/main.go  5

See the complete overview on Codacy