.agent/.github: add topology2 agent design guidance #22860

Job	Run time
LP64-WIP	3m 45s
build-windows (mnfst, imx8m imx8ulp)	9m 51s
build-windows (mnfst, tgl)	8m 12s
build-windows (-d, mnfst, lnl)	9m 14s
manifest-check	2m 42s
build-linux (mnfst, imx8 imx8x)	5m 22s
build-windows (mnfst, mtl)	8m 37s
build-linux (mnfst, imx8m imx8ulp)	4m 50s
build-linux (mnfst, mtl)	4m 48s
build-linux (mnfst, lnl)	5m 5s
build-windows (mnfst, lnl)	9m 38s
build-windows (mnfst, tgl-h)	9m 16s
build-windows (mnfst, imx8 imx8x)	10m 47s
build-windows (mnfst, ptl)	11m 9s
build-linux (mnfst, ptl)	5m 15s
build-linux (mnfst, wcl imx95)	7m 15s
build-linux (mnfst, tgl)	4m 11s
build-linux (mnfst, tgl-h)	4m 7s
build-linux (-d, mnfst, lnl)	4m 38s
compare-linux-win	28s
	2h 9m 10s

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