[doc,design] Mention the need to run cmdgen #2030

Job	Run time
Lint (quick)	3m 5s
Lint (slow)	12m 59s
Build Docker Containers	3m 5s
Airgapped build	9m 8s
CW305's Bitstream	21m 24s
Build and test software	14m 58s
Verible lint	1m 2s
Verilated English Breakfast	7m 39s
Earl Grey for CW310 / Build bitstream	1m 53s
Earl Grey for CW310 Hyperdebug / Build bitstream	1m 45s
Earl Grey for CW340 / Build bitstream	1m 45s
CW310 ROM_EXT Tests / FPGA test	9m 30s
CW310 Test ROM Tests / FPGA test	3m 28s
CW310 ROM Tests / FPGA test	50m 32s
CW310 Manufacturing Tests / FPGA test	23m 57s
CW310 SiVal Tests / FPGA test	20m 48s
CW310 SiVal ROM_EXT Tests / FPGA test	25m 45s
Cache bitstreams to GCP	0s
CW340 ROM Tests / FPGA test	1m 54s
CW340 ROM_EXT Tests / FPGA test	3m 58s
CW340 Test ROM Tests / FPGA test	7m 37s
CW340 SiVal Tests / FPGA test	16m 26s
CW340 SiVal ROM_EXT Tests / FPGA test	3m 21s
CW340 Manufacturing Tests / FPGA test	5m 44s
Verify FPGA jobs	22s
	4h 12m 5s

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