Thor e2e test

[darrenvechain]

Description

Add a setup for E2E testing. Added thor-e2e-tests as a submodule under the tests directory.

Type of change

Please delete options that are not relevant.

• E2E Testing Setup

How Has This Been Tested?

Adding additional tests from https://github.com/vechain/thor-e2e-tests

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• New and existing E2E tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have not added any vulnerable dependencies to my code

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (872ba93) 55.25% compared to head (ced9285) 55.25%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #655   +/-   ##
=======================================
  Coverage   55.25%   55.25%           
=======================================
  Files         179      179           
  Lines       20679    20679           
=======================================
  Hits        11427    11427           
  Misses       8416     8416           
  Partials      836      836           

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