added a feature to modify system settings

[AmanDevelops]

Issue Referenced

closes #46

Describe the Changes

Change 1: src/assistant.py

added query processor for volume control, brightness control , shutdown and restart

Change 2: src/commands.py

implementation of volume_control and brightness_control function.

Type of Change

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

Additional Setup Requirements

No Response

Necessary Conditions

• I have commented on my code, particularly in hard-to-understand areas.
• My changes generate no new warnings.
• The changes do not involve any Private data leak/reveal.
• Secrets, if any, are kept hidden via an environment file, whose structure has been explained via documentation.

Please make sure to check the following milestones before submitting the bug report!

[vihar-s1]

@AmanDevelops please resolve the format check errors occurring the workflow.

[AmanDevelops]

@vihar-s1 fixed now..