Add macos package builder

[VijayanB]

Added script which will generate macos pkg from opensearch-cli binary. To generate pkg, copy opensearch-cli binary into application folder. Execute script "build-macos.sh" by following usuage instructions. pkg will be generated inside target/pkg directory.

Signed-off-by: Vijayan Balasubramanian balasvij@amazon.com

Description

[Describe what this change achieves]

Issues Resolved

[List any issues this PR will resolve]

Check List

• [ ] New functionality includes testing.
  • [ ] All tests pass
• [ ] New functionality has been documented.
  • [ ] New functionality has documentation added
• [x] Commits are signed as per the DCO using --signoff

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[codecov-commenter]

Codecov Report

Merging #40 (81452e3) into main (199b1d1) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #40   +/-   ##
=======================================
  Coverage   67.26%   67.26%           
=======================================
  Files          31       31           
  Lines        1848     1848           
=======================================
  Hits         1243     1243           
  Misses        499      499           
  Partials      106      106           

Flag	Coverage Δ
opensearch-cli	67.26% <ø> (ø)

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