[WIP] System Contracts Documentation.

[eanzhao]

1. Introduce every system smart contract running on aelf mainnet & testnet, including goals and initial ideas.
2. Explain the implementations of critical methods.
3. Provide a few demos for developers' usage.

TODO:

• Genesis Contract Genesis Contract Documentation. #3479
• AEDPoS Contract (Consensus Contract)
• MultiToken Contract
• CrossChain Contract
• Vote Contract
• Profit Contract
• Election Contract
• Association Contract
• Referendum Contract
• Parliament Contract
• Treasury Contract
• TokenHolder Contract
• Economic Contract
• TokenConvert Contract
• Configuration Contract

[vizipi]

Pull request analysis by VIZIPI

Below you will find who is the most qualified team member to review your code.
This analysis includes his/her work on the code included in this Pull request, in addition to their experience in code affected by these changes ( partly found within the list of potential missing files below )   Feedback always welcome

Reviewers with knowledge related to these changes

Match %	Person	Commit Count	Common Files
5.88 %	AbigailDeng	9	1
5.88 %	ZhangXin	7	1
5.88 %	wangyue	5	1
5.88 %	lhoopox	2	1
5.88 %	jason-hoopox	1	1

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Potential missing files from this Pull request

No commonly committed files found with a 40% threashold

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Committed file ranks

(click to expand)

0.00%[docs-sphinx/reference/smart-contract/economic-contract.md]

0.00%[docs-sphinx/reference/smart-contract/profit-contract.md]

92.70%[docs-sphinx/index.rst]

0.00%[...docs-sphinx/reference/smart-contract/cross-chain-contract]

0.00%[docs-sphinx/reference/smart-contract/consensus-contract.md]

0.00%[...docs-sphinx/reference/smart-contract/token-convert-contra]

0.00%[...docs-sphinx/reference/smart-contract/association-contract]

20.59%[docs-sphinx/reference/smart-contract/genesis-contract.md]

0.00%[docs-sphinx/reference/smart-contract/parliament-contract.md]

0.00%[docs-sphinx/reference/smart-contract/treasury-contract.md]

[codecov]

Codecov Report

Merging #3478 (233e63b) into docs (107aacf) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             docs    #3478   +/-   ##
=======================================
  Coverage   91.05%   91.05%           
=======================================
  Files         619      619           
  Lines       23682    23682           
  Branches     2093     2093           
=======================================
  Hits        21563    21563           
  Misses       1988     1988           
  Partials      131      131