Write fake action

[jose-caballero]

Write a fake action that does not perform anything, and does not interact with any service.
The whole purpose of this action is to be used to validate that a new instance of stackstorm has been properly deployed and actions can be triggered from the web interface without the need to perform any real task.

Description:

Special Notes:

---

Submitter:

Have you (where applicable):

• Added unit tests?
• Checked the latest commit runs on Dev?
• Updated the example config file(s) and README?

---

Reviewer

Does this PR:

• Place non-StackStorm code into the lib directory?
• Have unit tests for the action/sensor and lib layers?
• Have clear and obvious action parameter names and descriptions?

[codecov]

Codecov Report

❌ Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 99.54%. Comparing base (c94154f) to head (5340927).
⚠️ Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
lib/workflows/hello_world.py	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #446      +/-   ##
==========================================
- Coverage   99.69%   99.54%   -0.16%     
==========================================
  Files         109      110       +1     
  Lines        2648     2652       +4     
  Branches      332      332              
==========================================
  Hits         2640     2640              
- Misses          7       11       +4     
  Partials        1        1              

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