add gas inspection plugin

[sparrowDom]

To measure the gas usage of any transaction wrap it into GetGas globally defined function. Example:

	const gas = await GetGas(await cEvilContract.connect(daniel).approveAllTokens());
	console.log('Gas used: ' + gas);

example output:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (66fe62b) 67.67% compared to head (40870f1) 64.86%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1936      +/-   ##
==========================================
- Coverage   67.67%   64.86%   -2.81%     
==========================================
  Files          52       52              
  Lines        2741     2741              
  Branches      708      708              
==========================================
- Hits         1855     1778      -77     
- Misses        883      960      +77     
  Partials        3        3              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[shahthepro]

It looks like this plugin hasn't been updated in about 18 months. The GitHub repo has no activity either. Would be better if we can use something that's being actively maintained

[naddison36]

How is this better than hardhat-gas-reporter which can be enabled with
export REPORT_GAS=true

Example output from running the OETH Oracle Router fork tests

·----------------------------------------------------|---------------------------|-------------|-----------------------------·
|                Solc version: 0.8.7                 ·  Optimizer enabled: true  ·  Runs: 200  ·  Block limit: 30000000 gas  │
·····················································|···························|·············|······························
|  Methods                                                                                                                   │
································|····················|·············|·············|·············|·············|················
|  Contract                     ·  Method            ·  Min        ·  Max        ·  Avg        ·  # calls    ·  eur (avg)    │
································|····················|·············|·············|·············|·············|················
|  MockOETHOracleRouterNoStale  ·  price             ·      22044  ·      41364  ·      34511  ·          4  ·            -  │
································|····················|·············|·············|·············|·············|················
|  OETHOracle                   ·  latestRoundData   ·          -  ·          -  ·      28373  ·          1  ·            -  │
································|····················|·············|·············|·············|·············|················
|  OETHOracle                   ·  setOracleUpdater  ·          -  ·          -  ·      30157  ·          2  ·            -  │
································|····················|·············|·············|·············|·············|················
|  OETHOracleUpdater            ·  addPrice          ·      77520  ·      89434  ·      87051  ·          5  ·            -  │
·-------------------------------|--------------------|-------------|-------------|-------------|-------------|---------------·