Add disclaimer in README and process warning

[trivikr]

Issue

Fixes: #676

Description

Adds disclaimer in README and process warning

Testing

The disclaimer is emitted at when codemod is run:

$ ./bin/aws-sdk-js-codemod -t v2-to-v3 ../test/example.ts 

╔════════════════════════════════════════════════════════╗
║ Please review the code change thoroughly for required  ║
║ functionality before deploying it to production.       ║
║                                                        ║
║ If the transformation is not complete or is incorrect, ║
║ please report the issue on GitHub.                     ║
╚════════════════════════════════════════════════════════╝

Processing 1 files... 
Spawning 1 workers...
Sending 1 files to free worker...
All done. 
Results: 
0 errors
1 unmodified
0 skipped
0 ok
Time elapsed: 0.229seconds

Warning is suppressed if AWS_SDK_JS_CODEMOD_SUPRESS_WARNING is set.

$ AWS_SDK_JS_CODEMOD_SUPRESS_WARNING=1 ./bin/aws-sdk-js-codemod -t v2-to-v3 ../test/example.ts
Processing 1 files... 
Spawning 1 workers...
Sending 1 files to free worker...
All done. 
Results: 
0 errors
1 unmodified
0 skipped
0 ok
Time elapsed: 0.203seconds

Skipping the following as the option is not available in JSCodeShift:

• move disclaimer at the end of the transformation
• emit disclaimer only if there are transformations

---

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🦋 Changeset detected

Latest commit: 0927bd4

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
aws-sdk-js-codemod	Patch

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