Updating the Linting rules for project.

[M-A-D-A-R-A]

As of now there are some linting rules that are disabled/not mentioned for eg:-

• Unused_elements
• Unnecessary_imports
• deprecated_member_use, etc

I would to work on this issue. Please assign it to me. Thanks

Also there are some rules that are disabled in the analysis_options.YAML like

# Ignoring naming convention of using underscores instead of camelCase
    file_names: false

# Ignoring having to make getters for setters
    avoid_setters_without_getters: false

are these intentionally disabled or do we need to work on those too?