New optional parameter to set time

[mikiw]

Add an optional parameter to set time feature that will skip block generation when the time is set so the next transaction will be generated with the exact time

[FabijanC]

Perhaps the optional parameter should be a boolean generate_block that is by default true

[mikiw]

devnet in py next_block_start_time logic:

    def next_block(self, block_info: BlockInfo, general_config: StarknetGeneralConfig):
        """
        Returns the next block info with the correct timestamp
        """
        if self.next_block_start_time is None:
            block_timestamp = now() + self.block_timestamp_offset
        else:
            block_timestamp = self.next_block_start_time
            self.block_timestamp_offset = block_timestamp - now()
            self.next_block_start_time = None

        return BlockInfo(
            gas_price=self.gas_price,
            block_number=block_info.block_number,
            block_timestamp=block_timestamp,
            sequencer_address=general_config.sequencer_address,
            starknet_version=CAIRO_LANG_VERSION,
        )