refactor(sequencer): output private key into file instead of console

[Halimao]

Summary

Writing private key to file when running astria-cli sequencer account create

Background

Addressed part of issue #594

Changes

• Writing private key to file when running astria-cli sequencer account create
• Update output message for private key
• Update create_account function comment

Testing

halimao@Halimao:astria$ ./target/release/astria-cli sequencer account create
Create Sequencer Account

Public Key:  "8703d3134c9de51b6ef1fb62a87f690410f2b4291b6acfc3c8e1a6bd9f338dd2"
Address:     "1e9edbd537755379be766fb59a0a2aba1e864230"
Private Key has been output into priv.key.
Note: Do not share or lose this private key!
halimao@Halimao:astria$ cat priv.key 
*******bcd354f3226a3351747b718e591*********

Metrics

Breaking Changelist

Related Issues

closes #594

[Halimao]

@noot Hi sir, could you please help me review this pr

[joroshiba]

This PR is stale because it has been open 45 days with no activity. Remove stale label or this PR will be
closed in 7 days.

[Halimao]

Your team ignored contributors' PR for a long time and told me that this PR now has no activity.

Have you ever responded to the PR before?