Write install guide #1619

Job	Run time
Flutter Quality checks (ubuntu, gui/packages/p4w_ms_store)	1m 35s
Flutter integration tests (windows)	9m 50s
Go Quality checks (ubuntu, agentapi)	1m 10s
Flutter Quality checks (ubuntu, gui/packages/ubuntupro)	3m 18s
Go Quality checks (ubuntu, contractsapi)	10s
Flutter Quality checks (windows, gui/packages/p4w_ms_store)	2m 50s
Go Quality checks (ubuntu, mocks)	57s
Flutter Quality checks (windows, gui/packages/ubuntupro)	5m 15s
Go Quality checks (ubuntu, storeapi/go-wrapper/microsoftstore)	42s
Run Go tests with mocks (ubuntu, windows-agent)	4m 17s
Go Quality checks (ubuntu, windows-agent)	1m 0s
Run Go tests with mocks (ubuntu, wsl-pro-service)	3m 8s
Go Quality checks (ubuntu, wsl-pro-service)	1m 25s
Run Go tests with mocks (windows, storeapi/go-wrapper/microsoftstore)	2m 34s
Go Quality checks (ubuntu, common)	1m 0s
Run Go tests with mocks (windows, windows-agent)	4m 28s
C++ Quality Checks	3m 30s
Run Go tests with mocks (windows, common)	1m 35s
Go Quality checks (windows, agentapi)	2m 58s
Go Quality checks (windows, contractsapi)	55s
Go Quality checks (windows, mocks)	2m 28s
Go Quality checks (windows, storeapi/go-wrapper/microsoftstore)	1m 40s
Go Quality checks (windows, windows-agent)	3m 57s
Build wsl-pro-service debian package	3m 38s
Build Windows Agent Appx	6m 20s
Go Quality checks (windows, end-to-end)	4m 24s
Go Quality checks (windows, common)	2m 14s
gRPC files are up to date (agentapi)	1m 47s
gRPC files are up to date (wslserviceapi)	57s
	1h 20m 2s

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