[tool] Add blockplayer

[Liuhaai]

TBD

[codecov[bot]]

Codecov Report

Merging #3182 (093a3ba) into master (a34b428) will decrease coverage by 0.03%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #3182      +/-   ##
==========================================
- Coverage   75.13%   75.09%   -0.04%     
==========================================
  Files         221      221              
  Lines       21019    21027       +8     
==========================================
- Hits        15793    15791       -2     
- Misses       4391     4400       +9     
- Partials      835      836       +1     

Impacted Files	Coverage Δ
action/protocol/context.go	36.29% <0.00%> (-1.53%)	:arrow_down:
blockchain/blockdao/blockdao.go	57.39% <0.00%> (-0.79%)	:arrow_down:
db/trie/mptrie/branchnode.go	97.22% <0.00%> (-1.39%)	:arrow_down:

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