Move intro docs from flytesnacks to flyte #1808

Job	Run time
unpack-envvars	1s
Docker Build Images (datacatalog) / build_docker	2m 11s
Docker Build Images (flyteadmin) / build_docker	2m 49s
Docker Build Images (flytecopilot) / build_docker	2m 4s
Docker Build Images (flytepropeller) / build_docker	2m 58s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	3m 36s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	2m 30s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	2m 23s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	3m 9s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	3m 27s
Check Go Generate (flytecopilot) / Go Generate	1m 21s
Check Go Generate (flyteadmin) / Go Generate	2m 29s
Check Go Generate (datacatalog) / Go Generate	1m 31s
Check Go Generate (flytepropeller) / Go Generate	2m 28s
Lint (datacatalog) / Run Lint	2m 29s
Lint (flyteadmin) / Run Lint	3m 29s
Lint (flyteidl) / Run Lint	1m 58s
Lint (flyteplugins) / Run Lint	2m 53s
Lint (flytepropeller) / Run Lint	3m 17s
Lint (flytestdlib) / Run Lint	2m 47s
Unit Tests (datacatalog) / Run Unit Test	2m 54s
Unit Tests (flyteadmin) / Run Unit Test	4m 21s
Unit Tests (flytecopilot) / Run Unit Test	2m 42s
Unit Tests (flyteplugins) / Run Unit Test	3m 49s
Unit Tests (flytepropeller) / Run Unit Test	4m 14s
Unit Tests (flytestdlib) / Run Unit Test	3m 50s
Integration Test (flyteadmin) / Integration tests	5m 35s
	1h 17m 15s

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