Introduce husky and prettier

[shaavan]

Summary:
This pull request adds lint-staged, Husky, and Prettier to ensure consistent formatting and streamlined pre-commit checks for Markdown files. The existing .yml CI scripts for Markdown linting and spell checking remain unchanged.

Changes:
Husky and lint-staged:

• Added Husky with a pre-commit hook to automatically run lint-staged.
• Configured lint-staged to run Prettier on staged Markdown files before each commit.

Prettier:

• Introduced Prettier for consistent Markdown formatting.
• Prettier is configured to format Markdown files (.md) according to the project’s style rules.