chore(packages): Remove legacy `contracts`

ops: delete legacy ops package

cleanup: delete bss-core

The `ops-bedrock` package will likely be migrated to
the `ops` package. Keep around the dockerfile because the
builds of the `fault-detector` and the `chain-mon` depend
on this dockerfile. We should eventually refactor away this
dockerfile and follow the pattern that the other packages use
where the dockerfile is in the particular package instead of
being outside in its own package.

The `txmgr` was migrated to `op-service` and `bss-core`
is no longer used.

cleanup: delete legacy batch submitter

op-node: TestChannelBankInterleaved

feat: Add example.env

The batch submitter uses `l2geth` as a dep, so
delete the batch submitter first

deps(indexer): Use latest version of go-chi

cleanup: delete l2geth-exporter

feat(ctb): Pull in relevant PoPs work

op-geth: Pull in latest op-geth changes (v1.101106.0-rc.2)

docs(readme): Cleanup the readme post-bedrock

op-batcher: Add metrics for pending L2 transaction data size

op-node: support erigon_getBlockReceiptsByBlockHash