Move CI to GitHub Actions #6

Job	Run time
Validation	4s
Ruby linter (RuboCop)	15s
JavaScript linter (Prettier)	50s
Node.js 18 - Build	57s
Node.js 20 - Build	53s
Node.js 22 - Build	57s
Integration tests (Express + Redis)	3m 46s
Git linter (Lintje)	9s
Integration tests (Express + Knex.js)	2m 28s
Integration tests (Koa + MySQL)	2m 51s
Integration tests (Koa + Mongo)	2m 54s
Integration tests (Express + Mongoose)	3m 25s
Integration tests (Express + Postgres)	2m 34s
Integration tests (Express + Apollo)	2m 43s
Integration tests (Express + Yoga)	2m 47s
Integration tests (Express + Prisma + Postgres)	5m 13s
Integration tests (Express + Prisma + Mongo)	2m 50s
Integration tests (Next.js)	3m 5s
Integration tests (Nest.js)	2m 28s
Integration tests (Fastify)	2m 27s
Node.js 20 - Extra test - diagnose	5s
Node.js 20 - Tests	4s
Node.js 18 - Extra test - diagnose	5s
Node.js 18 - Tests	8s
Node.js 22 - Tests	7s
Node.js 22 - Extra test - diagnose	5s
	44m 10s

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