refactor: Convert itinerary legs to segments for easier rendering #5433

Job	Run time
Build application and assets	6m 15s
file_changes	6s
Build Docker image	7m 17s
Formatting / JavaScript & TypeScript	28s
Linting / TypeScript	41s
Linting / Elixir	3m 31s
Formatting / Elixir	3m 2s
Unit tests / JavaScript / Mocha	35s
Unit tests / JavaScript & TypeScript / Jest	2m 9s
Linting / JavaScript	31s
Linting / CSS	35s
Type checks / Elixir	3m 51s
Type checks / TypeScript	32s
Unit tests / Elixir / mix coveralls.html	1m 1s
	30m 34s

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