refactor: move cli to separate workspace

[laststylebender14]

Summary:

1. created separate workspace tailcall-main for cli.
2. moved all cli code to newly created workspace.

Issue Reference(s):
Fixes #... (Replace "..." with the issue number)

Build & Testing:

• [ ] I ran cargo test successfully.
• [ ] I have run ./lint.sh --mode=fix to fix all linting issues raised by ./lint.sh --mode=check.

Checklist:

• [ ] I have added relevant unit & integration tests.
• [ ] I have updated the documentation accordingly.
• [ ] I have performed a self-review of my code.
• [ ] PR follows the naming convention of <type>(<optional scope>): <title>

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 90.32258% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 88.36%. Comparing base (c053851) to head (b0226c6). Report is 2 commits behind head on main.

Files	Patch %	Lines
tailcall-main/src/cli/tc.rs	0.00%	3 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1960      +/-   ##
==========================================
- Coverage   89.73%   88.36%   -1.37%     
==========================================
  Files         155      154       -1     
  Lines       15830    15334     -496     
==========================================
- Hits        14205    13550     -655     
- Misses       1625     1784     +159     

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[laststylebender14]

closing this in response to #1959.