Rename dirs

[LadyChristina]

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Description

Renamed main package from 'src' to 'consensus_decentralization' to match project name and in accordance with these guidelines: https://docs.python-guide.org/writing/structure/#the-actual-module

Also renamed 'input' to 'raw_block_data', as the name input can be misleading (for example the mapping takes its input from the 'output' directory)