chore(monitor): print out l2 fees components

[spalladino]

Helps debugging fee issues in tests. Also includes a README on how fees are computed in L2.

[16:51:01.188] INFO: e2e:e2e_epochs:epochs_mbps L1 block 25 mined at 16:58:17 {"currentTimestamp":1773431897,"l1Timestamp":"1773431897","l1BlockNumber":25,"l2SlotNumber":13,"l2Epoch":3,"checkpointNumber":2,"provenCheckpointNumber":0,"totalL2Messages":0,"sequencerCost":"214068600000","proverCost":"642215700000","congestionCost":"0","congestionMultiplier":"1000000000","minFeePerMana":"856284300000","l1BaseFee":"713561860","l1BlobFee":"1","ethPerFeeAsset":"10000000","manaTarget":"100000000"}
[16:51:05.194] INFO: e2e:e2e_epochs:epochs_mbps L1 block 26 mined at 16:58:21 {"currentTimestamp":1773431901,"l1Timestamp":"1773431901","l1BlockNumber":26,"l2SlotNumber":13,"l2Epoch":3,"checkpointNumber":2,"provenCheckpointNumber":0,"totalL2Messages":0,"sequencerCost":"214068600000","proverCost":"642215700000","congestionCost":"0","congestionMultiplier":"1000000000","minFeePerMana":"856284300000","l1BaseFee":"713561860","l1BlobFee":"1","ethPerFeeAsset":"10000000","manaTarget":"100000000"}
[16:51:09.208] INFO: e2e:e2e_epochs:epochs_mbps L1 block 27 mined at 16:58:25 with minFee=248383500000 {"currentTimestamp":1773431905,"l1Timestamp":"1773431905","l1BlockNumber":27,"l2SlotNumber":14,"l2Epoch":3,"checkpointNumber":2,"provenCheckpointNumber":0,"totalL2Messages":0,"sequencerCost":"62093400000","proverCost":"186290100000","congestionCost":"0","congestionMultiplier":"1000000000","minFeePerMana":"248383500000","l1BaseFee":"206977871","l1BlobFee":"1","ethPerFeeAsset":"10000000","manaTarget":"100000000"}