fix version flag for booster-http and booster-bitswap

[nonsense]

This PR adds version cmd to booster-http and syncs the version flag for booster-bitswap as it is used on boostd.

[nonsense]

No need for this, --version flag is supported out of the box with urfave/cli

[nonsense]

We shouldn't use -v for verbose, it is used for --version typically.

[LexLuthr]

I agree with the flag naming convention. We should stick to traditional naming. We also need to update other binaries and docs as well.

-v, --version = version
-V, --verbose = Verbose

[nonsense]

I agree with the flag naming convention. We should stick to traditional naming. We also need to update other binaries and docs as well.

-v, --version = version -V, --verbose = Verbose

I think -v for --version and --vv for --very-verbose is probably good enough. Then we have 2 levels of logging, and anything else is really custom and probably belongs to set-log-level command.