Adds the ability to specialize existing transformations to be applied with separate configurations to different portions of the data based on configurable filters.

[mmcdermott]

Adds a sort of "meta" stage configuration set-up in which transforms can be made to be applied to portions of dataframes conditionally via specified filters. This paradigm is called the "match & revise" pattern. Once merged, this will close #101

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[mmcdermott]

@prenc I know this is still quite preliminary, but does this look like it would capture what you're wanting out of match & revise?

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.29%. Comparing base (9877f92) to head (f2d2d0e). Report is 307 commits behind head on dev.

:white_check_mark: All tests successful. No failed tests found.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #119 +/- ## ========================================== + Coverage 93.07% 93.29% +0.21% ========================================== Files 25 24 -1 Lines 1892 1774 -118 ========================================== - Hits 1761 1655 -106 + Misses 131 119 -12 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.