feat: add support for AWS SSO profile in config

[narenaryan]

Description

This PR adds support for AWS SSO profiles. Just set the below key in Whispr config:

vault: aws
sso_profile: dev

Where dev is the SSO profile name used to sign into AWS.

Changes

• Add AWS SSO Profile support
• Improve Whispr CLI commands help messages
• Add a clean_build script for local package build and test

[coveralls]

Pull Request Test Coverage Report for Build 12223745179

Details

• 9 of 11 (81.82%) changed or added relevant lines in 4 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+8.4%) to 78.992%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/whispr/about.py	0	1	0.0%
src/whispr/cli.py	0	1	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/whispr/cli.py	1	0.0%

Totals
Change from base Build 11875375064:	8.4%
Covered Lines:	188
Relevant Lines:	238

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💛 - Coveralls