chore(typescript): initial Typescript setup #3568

Job	Run time
Lint Addon	32s
Lint Test App	27s
embroider-optimized - Allowed to fail	53s
Tests (Floating Dependencies)	1m 13s
ember-beta - Allowed to fail	48s
ember-canary - Allowed to fail	50s
Tests (ember-4.0, false)	1m 0s
Tests (ember-lts-4.4, false)	1m 7s
Tests (ember-lts-4.8, false)	58s
Tests (ember-4.12, false)	1m 7s
Tests (ember-lts-5.8, false)	1m 4s
Tests (ember-default, false)	1m 1s
Tests (ember-release, false)	55s
Tests (embroider-safe, false)	51s
	12m 46s

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