DRAFT: Code coverage: quite fast with just TS files included le filter was taking 10+ minutes), run within engine-test-utils with 'jest --coverage'

[nickolay-kondratyev]

Submitting draft to see if the tests pass, Refer to https://github.com/dendronhq/dendron/pull/2221 for more info.

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[kevinslin]

clean up old prs