Support github token via env for calls to github api

[ehennestad]

Useful when installing requirements from GitHub (i.e GitHub repos), as the GitHub public api has a low rate-limit and MatBox will make multiple api calls per repo.

Example step passing GITHUB_TOKEN as env to MATLAB:

    - name: Install Toolbox Dependencies
      uses: matlab-actions/run-command@v2
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      with:
        command: |
          try
              matbox.installRequirements(pwd, "AgreeToLicenses", true)
              savepath()
          catch ME
              fprintf('Error installing Toolbox dependencies: %s\n', ME.message);
              rethrow(ME);
          end

[github-actions]

Test Results

21 tests   21 ✅  16s ⏱️
 5 suites   0 💤
 1 files     0 ❌

Results for commit 73234b4.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

Attention: Patch coverage is 36.36364% with 21 lines in your changes missing coverage. Please review.

Project coverage is 42.75%. Comparing base (b323a59) to head (73234b4).
Report is 36 commits behind head on main.

Files with missing lines	Patch %	Lines
.../+setup/+internal/+github/+api/getLicenseHtmlUrl.m	0.00%	8 Missing ⚠️
...+setup/+internal/+github/+api/getCurrentCommitID.m	50.00%	4 Missing ⚠️
...setup/+internal/+github/+api/getGithubWebOptions.m	66.66%	3 Missing ⚠️
...nternal/+github/+api/getOrganizationRepositories.m	0.00%	3 Missing ⚠️
...matbox/+setup/+internal/downloadZippedGithubRepo.m	40.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #34      +/-   ##
==========================================
+ Coverage   41.11%   42.75%   +1.63%     
==========================================
  Files          53       58       +5     
  Lines        1182     1394     +212     
==========================================
+ Hits          486      596     +110     
- Misses        696      798     +102     

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