feat: able to specify context inline on commands

[Prashidha0O1]

Description

This PR addresses issue #158 by implementing the ability to specify context inline on shell commands, which makes it faster and more convenient for users who manage multiple instances/environments.

Changes

• Added a new --context flag to the shell command that accepts a string in the format organization:project:environment:service
• Implemented parsing logic to extract the individual components from the context string
• Added the necessary conditional logic in the command execution flow to prioritize the inline context flag
• Updated the command examples to include the new usage pattern

Usage:

Users can now run commands like:

qovery shell --context webapp:staging:web
qovery shell -c bash --context webapp:production:worker