refactor(ui): restructure terramate ui to action-first flow #5022

Job	Run time
discover	6s
benchmarks (fs)	2m 45s
benchmarks (cloud)	4m 27s
benchmarks (hcl/eval)	5m 52s
benchmarks (generate)	4m 24s
benchmarks (hcl/ast)	4m 56s
benchmarks (benchmarks/changed)	3m 26s
benchmarks (tg)	2m 36s
benchmarks (ls)	20m 11s
benchmarks (stdlib)	10m 6s
report	7s
	58m 56s

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