Add a pre-commit lint hook for staged files.

[sidharthv96]

Is your feature request related to a problem? Please describe.
This will ensure that the developer does not have to run lint manually

Describe the solution you'd like
Use lint-staged along with husky to lint all modified files before each commit

Describe alternatives you've considered
Manual linting / Save automatically via editor. But both are not standard.

Additional context
This has already been implemented in mermaid-live-editor

[harshilparmar]

@sidharthv96 I would like to work on this issue.