feat:cext-4860 added standalone commands

[simrangulati]

Implements the standalone commands for app builder db.

Description

To implement below commands for App Builder DB

1. db stats
2. db getCollectionNames
3. db show collections
4. db getCollectionInfos

Related Issue

Motivation and Context

It helps developers/users to get detailed information about the DB.

How Has This Been Tested?

1. By running unit tests
2. By linking the local version and testing commands on terminal

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[nofuss]

except for a missing --json handling, looks good to me

[nofuss]

Looks good, thought I don't understand the 'region' flag check.