How to configure DA chain block syncing time

The --rollkit.da_block_time flag is used to configure the time in seconds that the rollup will wait for a block to be synced from the DA chain.

--rollkit.da_block_time duration

An example command would look like this:

rollkit start [existing flags...] // [!code --]
rollkit start [existing flags...] --rollkit.da_block_time=30s // [!code ++]