feat: add TypeScript configuration #502

Job	Run time
Tests	1m 15s
Tests	1m 15s
Floating Dependencies	1m 30s
Floating Dependencies	1m 30s
ember-try: ember-lts-3.28	1m 45s
ember-try: ember-lts-3.28	1m 45s
ember-try: ember-lts-4.4	2m 4s
ember-try: ember-lts-4.4	2m 4s
ember-try: ember-release	1m 34s
ember-try: ember-release	1m 34s
ember-try: ember-beta	1m 54s
ember-try: ember-beta	1m 54s
ember-try: ember-canary	1m 46s
ember-try: ember-canary	1m 46s
ember-try: ember-classic	1m 32s
ember-try: ember-classic	1m 32s
ember-try: embroider-safe	1m 32s
ember-try: embroider-safe	1m 32s
ember-try: embroider-optimized	35s
ember-try: embroider-optimized	1m 34s
	31m 53s

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