Use docify export for parachain template hardcoded configuration and embed it in its README #6333 #18427

Job	Run time
preflight / preflight	42s
preflight / ci-versions	1m 5s
check-runtime-migration (westend)	6m 8s
check-runtime-migration (asset-hub-westend)	4m 35s
check-runtime-migration (bridge-hub-westend)	4m 17s
check-runtime-migration (collectives-westend)	4m 2s
check-runtime-migration (coretime-westend)	4m 13s
All runtime migrations passed	1s
	25m 3s

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