feat(explorer): add proving system to proofs

[glpecile]

Changes

• Add DB migration for proving systems support in proofs table
• Grab proving system from S3
• Refactor S3 utils functions into separate module
• Add badge next to each proof hash with its proving system

Test

• Run locally aligned
• Clean your previous explorer db with make explorer_clean_db
• Start the explorer locally with make run_explorer
• Send proofs with any of the batcher commands and press the "Show Proofs" button in the batch details view

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