Refactored main.py and filters.py and added dependencies

[Param302]

Description

Dependencies

aiofiles==22.1.0

autopep8==2.0.1

Refactored

main.py

• Removed conditions from filter_colleges(), do all in one using get_colleges().
• Stored metadata of CollegeAPI in API_METADATA.
• removed unnecessary dependencies.

filters.py

• Different field colleges / universities in 1 function named get_colleges().
• Replaced processing() with fetch_details() which generates the data, works more efficiently.
• Stored path of data folder in DATA_PATH.
• Stored fields mapped to their respective json files in FIELD_FILES.
• Added $2$ custom Exceptions inherited from ValueError

class InvalidFieldPassedError(ValueError):
    """
    Exception class to raise if invalid field passed.
    """
class InvalidRegionPassedError(ValueError):
    """
    Exception class to raise if invalid field passed.
    """

• Added check_values() function, which checks and raises above exceptions if data provided doesn't matched.

data directory

• Fixed cases of object parameters (city, state) of some files.

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Issue Ticket Number

Fixes **Refactor the codebase #171

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Type of change

• [x] Refactored code
• [x] 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 not work as expected)
• [ ] This change requires a documentation update

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Checklist:

• [x] Remove unnecessary dependencies.
• [x] Use/create functions to use reduce the repetition of code.
• [x] I have followed the contributing guidelines of this project as mentioned in CONTRIBUTING.md
• [x] I have checked to ensure there aren't other open Pull Requests for the same update/change?
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes needed to the documentation