Agent: Add content to ransomware README.txt file

[mssalvatore]

What does this PR do?

Issue #1244

Replaces the placeholder content in the ransomware README.txt file with cool ASCII art and useful information.

PR Checklist

• Have you added an explanation of what your changes do and why you'd like to include them?
• Is the TravisCI build passing?
• Was the CHANGELOG.md updated to reflect the changes?
• Was the documentation framework updated to reflect the changes?

Testing Checklist

• Added relevant unit tests?
• Have you successfully tested your changes locally? Elaborate:

  Tested by running unit tests

• If applicable, add screenshots or log transcripts of the feature working

Screenshots

[codecov]

Codecov Report

Merging #1276 (a45900a) into develop (00426c6) will decrease coverage by 29.73%.
The diff coverage is 26.29%.

❗ Current head a45900a differs from pull request most recent head 32a0a41. Consider uploading reports for the commit 32a0a41 to get more accurate results

@@             Coverage Diff              @@
##           develop    #1276       +/-   ##
============================================
- Coverage    59.89%   30.15%   -29.74%     
============================================
  Files          147      445      +298     
  Lines         4787    13353     +8566     
============================================
+ Hits          2867     4027     +1160     
- Misses        1920     9326     +7406     

Impacted Files	Coverage Δ
monkey/common/cloud/instance.py	66.66% <ø> (ø)
monkey/common/cmd/aws/aws_cmd_result.py	0.00% <0.00%> (ø)
monkey/common/cmd/aws/aws_cmd_runner.py	0.00% <0.00%> (ø)
monkey/common/cmd/cmd.py	0.00% <0.00%> (ø)
monkey/common/cmd/cmd_result.py	0.00% <0.00%> (ø)
monkey/common/cmd/cmd_runner.py	0.00% <0.00%> (ø)
monkey/common/cmd/cmd_status.py	0.00% <0.00%> (ø)
monkey/common/common_consts/__init__.py	100.00% <ø> (ø)
monkey/common/common_consts/network_consts.py	0.00% <0.00%> (ø)
monkey/common/network/segmentation_utils.py	100.00% <ø> (ø)
... and 538 more

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[VakarisZ]

This kind of is a ransomware attack or at least we're trying to get as close as possible to one. Maybe rephrase to This is NOT a real ransomware attack.?

[VakarisZ]

Maybe "Infection Monkey was here" would be better? In my mind, infection monkey spreading across the network is a valid reason to panic :D

[mssalvatore]

I'm having trouble getting "Infection Monkey was here" in a readable font. Anything easily readable comes out too large.

Since this PR has approvals, I'm going to merge it without this change. I'll have our marketing team look at this (and our documentation) before we release. They'll probably come up with something better.