move db commands to commands crate

[mattsse]

these commands only depend on the db itself:

reth/bin/reth/src/commands/db/mod.rs

Line 1 in 71e47f4

//! Database debugging tool

and can easily be moved to new commands crate:

reth/crates/cli/commands/src/lib.rs

Line 1 in 71e47f4

//! Commonly used reth CLI commands.

TODO

• move reth/commands/db to cli/commands