Replace typesafe-i18n with svelte-i18n #85

Job	Run time
Check for file changes requiring python tests	23s
Check for file changes requiring python linter	22s
Check for file changes requiring SQL tests	15s
Check for file changes requiring front end checks	11s
Check front end code format	26s
Audit front end code	19s
Run front end tests	38s
Run front end linter	3m 4s
Check front end types	41s
Run SQL tests	0s
Find unused code	8s
Run Python linter	9s
Run Python tests (13)	16m 50s
Run Python tests (14)	15m 11s
Run Python tests (15)	9m 38s
matrix_tests	0s
	48m 15s

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