Add new cli command to download public node snapshots

[joshieDo]

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Describe the feature

It would be nice to have a dedicated command that only given a chain and datadir it would automatically download a public available snapshot into disk (example below).

Usage example: reth download reth download --chain holesky reth download --chain holesky --datadir holesky-node reth download --chain holesky --datadir holesky-node --url https://downloads.merkle.io/reth-2024-10-23.tar.lz4

Publicly available snapshots (both .tar.lz4): https://snapshots.merkle.io/ https://publicnode.com/snapshots

Additional context

No response