chore: 🤖 Add initial page layout for code editor + sidebar #712

Job	Run time
test (community, hashicorp/boundary, boundary, oss, e2e_ui_docker, admin:ce:docker, main)	31m 24s
test (enterprise, hashicorp/boundary-enterprise, boundary-enterprise, ent, e2e_ui_docker_ent, adm...	37m 0s
	1h 8m 24s

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