MVP: Imperative Event Emitter

[zFernand0]

What It Does

• Introduce client event emission capabilities

How to Test

You may need to create a dummy app (e.g. VSCE) in order to test this 😋
( or use fernando's example VSCE - amber's comment )

UPDATE:
Here is a public instance of the sample VSCE

• https://github.com/zowe/zowe-cli-sample-scripts/tree/add-sample-vsce/client-event-handling/sample-vsce

Review Checklist
I certify that I have:

• tested my changes
• added/updated automated tests
• updated the changelog
• followed the contribution guidelines

Additional Comments

TODO:

• Integration/system testing
• Documentation of the new behavior
• Outline of future plans (see packages/imperative/src/events/src/ImperativeEventConstants.ts)

Expand this section for a complete list of future enhancements

 The following list of event types will only be implemented upon request
 
  Shared events:
    Global:
       - $ZOWE_CLI_HOME/.events/onConfigChanged
       - $ZOWE_CLI_HOME/.events/onSchemaChanged
    Project:
       - $ZOWE_CLI_HOME/.events/<project-hash-based-on-path>/onConfigChanged
       - $ZOWE_CLI_HOME/.events/<project-hash-based-on-path>/onSchemaChanged
  User events:
    Global:
       - ~/.zowe/.events/onUserConfigChanged
    Project:
       - ~/.zowe/.events/<project-hash-based-on-path>/onUserConfigChanged
  Custom events:
    Shared:
      Global:
       - $ZOWE_CLI_HOME/.events/<hash-based-on-app-name>/<event-id>
      Project:
       - $ZOWE_CLI_HOME/.events/<hash-based-on-app-name>/<project-hash-based-on-path>/<event-id>
    User:
      Global:
       - ~/.zowe/.events/<hash-based-on-app-name>/<user-event-id>
      Project:
       - ~/.zowe/.events/<hash-based-on-app-name>/<project-hash-based-on-path>/<user-event-id>

[codecov]

Codecov Report

Attention: Patch coverage is 96.70330% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 91.20%. Comparing base (1016963) to head (d68e05d).
Report is 2 commits behind head on next.

Files	Patch %	Lines
...mperative/src/events/src/ImperativeEventEmitter.ts	96.42%	4 Missing ⚠️
packages/imperative/src/config/src/ConfigUtils.ts	95.45%	1 Missing ⚠️
...tive/src/security/src/CredentialManagerOverride.ts	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #2118      +/-   ##
==========================================
+ Coverage   91.15%   91.20%   +0.05%     
==========================================
  Files         623      628       +5     
  Lines       17716    17877     +161     
  Branches     3763     3750      -13     
==========================================
+ Hits        16149    16305     +156     
- Misses       1566     1571       +5     
  Partials        1        1              

☔ View full report in Codecov by Sentry.
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[traeok]

Looks great so far! Going to run some tests locally, but the logic makes sense to me. I left some feedback regarding some of the types and the CodeQL warning.

[zFernand0]

Thanks for the review! 🙏🏽
Moving this back to draft to address these items 😋

Changes were address 😋

[zFernand0]

This PR should be ready to review as-is.

There will be many more changes happening once the following PR gets in:

• Event Operator and Processor #2136

[gejohnston]

I made all of my comments while this PR was still draft, and most of those comments were just questions.

[traeok]

LGTM, thanks for all your work on this and for addressing feedback 😁 This is a nice stepping stone for Zowe Client apps and extensions to keep in sync with one another 😋

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
92.9% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[zFernand0]

Merging in order to get the MVP out in its own prerelease version (next-<timestamp>)

[github-actions]

Release succeeded for the next branch. 🎉

The following packages have been published:

• npm: @zowe/[email protected]
• npm: @zowe/[email protected]
• npm: @zowe/[email protected]
• npm: @zowe/[email protected]
• npm: @zowe/[email protected]
• npm: @zowe/[email protected]
• npm: @zowe/[email protected]
• npm: @zowe/[email protected]
• npm: @zowe/[email protected]
• npm: @zowe/[email protected]
• npm: @zowe/[email protected]
• npm: @zowe/[email protected]
• npm: @zowe/[email protected]
• npm: @zowe/[email protected]

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