feat: add bech32-convert to gaia

[glnro]

Summary

Add the bech32-convert subcommand to debug that is currently implemented in osmosis. This would serve as a general UX improvement as well as prepare for future roadmap features like bech32 forwarding.

Problem Definition

If a user wishes to convert a bech32 address to the equivalent on another chain, there is currently no way to do this via the gaia cli.

Proposal

Implement ConvertBech32Cmd in gaia according to osmosis' command. Nice to have implementation could also include abstracting the logic out into a separate helper function.

The command should natively convert any address to the cosmos prefix, and accept a flag for an alternative chain prefix.

Acceptance Criteria

1. Should natively convert any valid bech32 address to a cosmos prefixed address
   Input:
   gaiad debug bech32-convert akash1a6zlyvpnksx8wr6wz8wemur2xe8zyh0ytz6d88
   Output:
   cosmos1a6zlyvpnksx8wr6wz8wemur2xe8zyh0yxeh27a

2. Should convert any valid bech32 address to the prefixed address
   Input:
   gaiad debug bech32-convert cosmos1a6zlyvpnksx8wr6wz8wemur2xe8zyh0yxeh27a --prefix osmo
   Output:
   osmo1a6zlyvpnksx8wr6wz8wemur2xe8zyh0ywzy6g0

3. Should return the same address if converting a native address
   Input:
   gaiad debug bech32-convert cosmos1a6zlyvpnksx8wr6wz8wemur2xe8zyh0yxeh27a
   Output:
   cosmos1a6zlyvpnksx8wr6wz8wemur2xe8zyh0yxeh27a

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[ivanovpetr]

Would be happy to work on it!

[okwme]

thank you @ivanovpetr !!!