* Explore: updates prom query field styles with flex-grow

* Explore: adds prometheus explore query editor

* Explore: updates step input width in prom explore query editor

* Explore: updates prom explore query editor step field input placeholder to auto

* Explore: updates prom explore query editor to include history

* Explore: updates prom explore query editor, removes unused lodash import

* Explore: updates step spacing in prom explore query editor

* Explore: updates prom explore query editor - moves logic to query field

* Explore: updates prom query field - adds step field with conditional rendering

* Explore: updates promql cheat sheet with step description

* Explore: updates prom cheat sheet  step description

* Explore: updates styles - adds query row break class

* Explore: moves back step markup to PromExploreQueryEditor