update(devnet-tasks): add complete and editable tests

[nidz-the-fact]

Description

Update: Added .env (dotenv) helper and sepolia network for testing to allow developers to test better.

Tests

Configuring (external) development environment for devnet testing.

Additional context

Use external configuration By adjusting the .example.env file, remove .example and configure it in .env (referenced with hardhat in hardhat.config.ts).

Metadata

• Fixes #[Link to Issue] none

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.64%. Comparing base (f5221f4) to head (924020f).
Report is 2 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #11177      +/-   ##
===========================================
+ Coverage    62.58%   62.64%   +0.05%     
===========================================
  Files           21       21              
  Lines         1935     1938       +3     
  Branches        71       73       +2     
===========================================
+ Hits          1211     1214       +3     
  Misses         687      687              
  Partials        37       37              

Flag	Coverage Δ
cannon-go-tests	80.21% <ø> (ø)
chain-mon-tests	27.14% <ø> (ø)
sdk-tests	16.91% <100.00%> (+0.46%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
packages/devnet-tasks/hardhat.config.ts	100.00% <100.00%> (ø)

[tynes]

This is fine to merge although this package is temporary and not guaranteed to always work. We will delete this package in the future.