feat: Introduce integrated terminal

[zFernand0]

⚠️ WIP ⚠️

Proposed changes

Introduces the MVS, TSO, and Unix command handlers as integrated terminals

Release Notes

Milestone: 3.1.0

Changelog: Introduces the MVS, TSO, and Unix command handlers as integrated terminals

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Enhancement (non-breaking change which adds or improves functionality)
• Breaking change (a change that would cause existing functionality to not work as expected)
• Documentation (Markdown, README updates)
• Other (please specify above in "Proposed changes" section)

Checklist

General

• I have read the CONTRIBUTOR GUIDANCE wiki
• All PR dependencies have been merged and published (if applicable)
• A GIF or screenshot is included in the PR for visual changes
• The pre-publish command has been executed:
  • v2 and below: yarn workspace vscode-extension-for-zowe vscode:prepublish
  • v3: pnpm --filter vscode-extension-for-zowe vscode:prepublish

Code coverage

• There is coverage for the code that I have added
• I have added new test cases and they are passing
• I have manually tested the changes

Deployment

• I have added developer documentation (if applicable)
• Documentation should be added to Zowe Docs
  • If you're an outside contributor, please post in the #zowe-doc Slack channel to coordinate documentation.
  • Otherwise, please check with the rest of the squad about any needed documentation before merging.
• These changes may need ported to the appropriate branches (list here):

Further comments

TODO:

• Address comments in Port zosconsole to next  #3058 (review)

[codecov]

Codecov Report

Attention: Patch coverage is 61.36364% with 119 lines in your changes missing coverage. Please review.

Project coverage is 92.02%. Comparing base (37a5102) to head (978ff99).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/zowe-explorer/src/tools/ZoweTerminal.ts	25.53%	70 Missing ⚠️
...s/zowe-explorer/src/commands/UnixCommandHandler.ts	59.42%	28 Missing ⚠️
.../zowe-explorer/src/commands/ZoweCommandProvider.ts	85.56%	14 Missing ⚠️
...es/zowe-explorer/src/commands/TsoCommandHandler.ts	80.76%	5 Missing ⚠️
...es/zowe-explorer/src/commands/MvsCommandHandler.ts	90.47%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3079      +/-   ##
==========================================
- Coverage   92.97%   92.02%   -0.96%     
==========================================
  Files         113      114       +1     
  Lines       11661    11621      -40     
  Branches     2617     2483     -134     
==========================================
- Hits        10842    10694     -148     
- Misses        817      925     +108     
  Partials        2        2              

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[sonarcloud]

Quality Gate failed

Failed conditions
1 Security Hotspot
22.7% Duplication on New Code (required ≤ 3%)

See analysis details on SonarCloud