Improve eslint disabled lines

Prerequisites

• I understand and accept the project's code of conduct
• I have already searched in existing features request and found no previous suggestion of this feature.

Is your feature request related to a problem?

Actually, there are 59 fully ESLint disabled lines

We can improve it by making it more specific to the error we need to disable

Describe the solution you'd like

Before: // eslint-disable-next-line

After: // eslint-disable-next-line max-len

Disabling every rules is a wrong practice because it's hiding some others errors that could be important to know

This work can be separated into multiple batches:

Back-office

• Default
• New theme

Front-office

• Classic
• Hummingbird

Alternatives you've considered

No response

Additional context

Acceptance Criteria

• Verify that the line is forced to be disabled because sometime the line could be disabled without any real reasons
• If it's the case, just ignore the specific rule instead of disabling every ESLint errors

Do you plan to work on this feature?

• I'm willing to contribute a formal specification.
• I'm willing to provide any wireframes or design assets required for this feature.
• I'm willing to submit a Pull Request that implements this feature.
• I'm willing to help verify that the implemented feature works as intended and produces no unintended side effects.