chore: e2e test cases for showkeys and `showcommands'

[rishabhKalakoti]

Description

The following e2e tests cases were written for the command teachcode showkeys:

• No config file present
• No keys in the config file
• Multiple keys in the config file

The following e2e tests cases were written for the command teachcode showcommands:

• No config file present
• Valid config file present

addresses #28

Type of change

• New feature (non-breaking change which adds functionality)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[jamesgeorge007]

Left few comments.

[jamesgeorge007]

Great work 🎉