fix: guide users to use generate only in messages for x/foundation authority

[0Tech]

Description

This patch will guide users to use the generate-only flag in following commands:

• MsgUpdateParams
• MsgWithdrawFromTreasury
• MsgUpdateMembers
• MsgUpdateDecisionPolicy
• MsgGrant
• MsgRevoke
• MsgGovMint

Checklist:

• I followed the contributing guidelines and code of conduct.
• I have added a relevant changelog to CHANGELOG.md
• I have added tests to cover my changes.
• I have updated the documentation accordingly.
• I have updated API documentation client/docs/swagger-ui/swagger.yaml

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (rc9/v0.46.0@0137a62). Click here to learn what that means.
The diff coverage is n/a.

Additional details and impacted files

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[tkxkd0159]

I have a few simple questions because of my poor understanding.

1. What is the purpose of CLI method with authority? (like when & why use it?)
   In docs mentioned, authority is a module account and have no private key. Then, how could sign this message with CLI? I just guessed those kinds of method only are executed by keeper through Exec.
2. How do we know the address of module account?

[0Tech]

1. What is the purpose of CLI method with `authority`? (like when & why use it?)
   In docs mentioned, authority is a module account and have no private key. Then, how could sign this message with CLI? I just guessed those kinds of method only are executed by keeper through `Exec`.

Please refer to the notes:
https://github.com/line/lbm-sdk/blob/v0.46.0-rc9/x/foundation/README.md#transactions

2. How do we know the address of module account?

It's just a truncated (20 bytes) sha256sum of a module name.

[tkxkd0159]

Please refer to the notes: https://github.com/line/lbm-sdk/blob/v0.46.0-rc9/x/foundation/README.md#transactions

Is it right that those CLI method just helps users for populating messages field easily?

[0Tech]

Please refer to the notes: https://github.com/line/lbm-sdk/blob/v0.46.0-rc9/x/foundation/README.md#transactions

Is it right that those CLI method just helps users for populating messages field easily?

Yes, that's it.