front: source extension for editor #5189

Job	Run time
check_commits	6s
check_infra_schema_sync	22s
check_generated_railjson_sync	27s
build	2m 42s
check_integration_tests	1m 23s
check_osrd_schema	45s
check_railjson_generator	1m 52s
check_toml	10s
Check final newline	11s
check_core	4m 7s
check_editoast_tests	5m 58s
check_editoast_lints	4m 35s
check_editoast_openapi	1m 40s
check_front_rtk_sync	1m 44s
check_front	2m 19s
check_gateway	1m 42s
integration_tests	4m 55s
	34m 58s

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