ci(coverage): add total typescript code coverage statistics

[aldousalvarez]

Commit to be reviewed

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ci(coverage): add total typescript code coverage statistics

Primary Changes
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1. Updated the ci.yaml and ci.sh to introduce total typescript code coverage statistics using jest and istanbul-merge

Fixes #2661

Pull Request Requirements

• Rebased onto upstream/main branch and squashed into single commit to help maintainers review it more efficient and to avoid spaghetti git commit graphs that obfuscate which commit did exactly what change, when and, why.
• Have git sign off at the end of commit message to avoid being marked red. You can add -s flag when using git commit command. You may refer to this link for more information.
• Follow the Commit Linting specification. You may refer to this link for more information.

Character Limit

• Pull Request Title and Commit Subject must not exceed 72 characters (including spaces and special characters).
• Commit Message per line must not exceed 80 characters (including spaces and special characters).

A Must Read for Beginners
For rebasing and squashing, here's a must read guide for beginners.

[petermetz]

@aldousalvarez Thank you very much for this! It's looking very good so far, I just have some questions above^^

[petermetz]

@aldousalvarez Please see #3285 (comment)

[aldousalvarez]

Hello @petermetz already done with the requested changes. Thank you. It will not run on this pull request but it will run on the default branch which is main once it gets merged.

[petermetz]

Hello @petermetz already done with the requested changes. Thank you. It will not run on this pull request but it will run on the default branch which is main once it gets merged.

@aldousalvarez Thank you for the updates! I agree it's time for us to take a look at it and see if it works on main. Fingers crossed! :-)

[jagpreetsinghsasan]

LGTM too

[petermetz]

@aldousalvarez Please fix the merge conflicts and then we are good to go! (Make sure to pass it back for review once the conflicts are fixed)

[aldousalvarez]

@petermetz Already fixed the merge conflict. Thank you!

[petermetz]

@aldousalvarez It might've happened again with another PR in the meantime, please fix again :-)

[aldousalvarez]

Hello @petermetz just fixed the merged conflicts. Thank you

[petermetz]

@aldousalvarez LGTM, thank you!