We need a built-in containSubset assertion for deep partial object comparison in Chai. Users who previously…

We need a built-in containSubset assertion for deep partial object comparison in Chai. Users who previously…: a task in LegoFlow-SWE (Harbor dataset). BDD style - expect(target).to.containSubset(subset) – passes when subset is a deep partial match of target . -…

The task

**BDD style** - `expect(target).to.containSubset(subset)` – passes when `subset` is a deep partial match of `target`. - `expect(target).to.not.containSubset(subset)` – passes when the target does **not** deeply contain the subset.

Part of Lego-X/LegoFlow-SWE.