chore(proto): Add a buf.gen.rs.yaml and corresponding script to create Rust types for Wasm Stargate messages

[Unique-Divine]

Context

This implements:

1. A buf.gen.*.yaml for Rust code generation
2. A corresponding script that programatically reads the go.mod for versions and performs the
   code generation with buf. Generated types end up in the git ignored dist folder.

• Related: feat(wasm): Create a Rust package to call module TxMsgs with CosmosMsg::StargateMsg #1580

For Reviewer

Try running bash proto/buf.gen.rs.sh from the root of the repo.
You should get the following output:

NIBIRU_REPO_PATH: /home/realu/warpath/NibiruChain/nibiru
OUT_PATH: /home/realu/warpath/NibiruChain/nibiru/dist
Grabbing cosmos-sdk proto file locations from disk
NIBIRU_REPO_PATH: /home/realu/warpath/NibiruChain/nibiru

Proto Directories: 
/home/realu/warpath/NibiruChain/cosmos-sdk/proto
Generating protobuf types for each proto_dir
------------ generating cosmos-sdk/proto ------------
------------ generating nibiru/proto ------------
Completed - proto_gen() to path: /home/realu/warpath/NibiruChain/nibiru/dist
🔥 Generated Rust proto types successfully. 

This should put a bunch of Rust code in your dist directory (it's gitignored).

Purpose

This is useful for implementing raw smart contract execute calls via
CosmosMsg::StargateMsg (rather than CosmosMsg::Custom). This functionality's needed to develop a Rust package that
has functions for calling TxMsgs from custom modules on Nibiru.

---

↑ For reference: the messages that can be sent from a contract are as follows:

#[non_exhaustive]
#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq, JsonSchema)]
#[serde(rename_all = "snake_case")]
// See https://github.com/serde-rs/serde/issues/1296 why we cannot add De-Serialize trait bounds to T
pub enum CosmosMsg<T = Empty> {
    Bank(BankMsg),
    // by default we use RawMsg, but a contract can override that
    // to call into more app-specific code (whatever they define)
    Custom(T),
    #[cfg(feature = "staking")]
    Staking(StakingMsg),
    #[cfg(feature = "staking")]
    Distribution(DistributionMsg),
    /// A Stargate message encoded the same way as a protobuf [Any](https://github.com/protocolbuffers/protobuf/blob/master/src/google/protobuf/any.proto).
    /// This is the same structure as messages in `TxBody` from [ADR-020](https://github.com/cosmos/cosmos-sdk/blob/master/docs/architecture/adr-020-protobuf-transaction-encoding.md)
    #[cfg(feature = "stargate")]
    Stargate {
        type_url: String,
        value: Binary,
    },
    #[cfg(feature = "stargate")]
    Ibc(IbcMsg),
    Wasm(WasmMsg),
    #[cfg(feature = "stargate")]
    Gov(GovMsg),
}

[Unique-Divine]

I'd recommend reading main() and working backwards since bash is a bit hard to follow

[codecov]

Codecov Report

Merging #1579 (fdde88f) into master (a039623) will decrease coverage by 0.02%.
Report is 1 commits behind head on master.
The diff coverage is n/a.

❗ Current head fdde88f differs from pull request most recent head e906ca7. Consider uploading reports for the commit e906ca7 to get more accurate results

@@            Coverage Diff             @@
##           master    #1579      +/-   ##
==========================================
- Coverage   70.73%   70.71%   -0.02%     
==========================================
  Files         181      180       -1     
  Lines       14917    14786     -131     
==========================================
- Hits        10551    10456      -95     
+ Misses       3677     3651      -26     
+ Partials      689      679      -10     

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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