docs: fix incorrect Prettier configuration docs in CONTRIBUTING.md and typos in README

[atulXdev]

Description

Closes #2190

The project documentation contained outdated and incorrect information about the Prettier configuration, which could mislead new contributors regarding the expected code style.

Changes Made

CONTRIBUTING.md

• Fixed incorrect statement: Removed the claim "While there's no .prettierrc file..." — a .prettierrc file exists in the project root
• Updated formatting rules to match the actual .prettierrc configuration:
  • ✅ Single quotes (singleQuote: true)
  • ✅ No semicolons (semi: false)
  • ✅ Trailing commas everywhere (trailingComma: "all")
  • ✅ Parentheses around arrow function parameters (arrowParens: "always")
• Removed incorrect defaults that were previously documented (double quotes, semicolons enabled, print width, tabs, ES5 trailing commas)

README.md

• Fixed typo: deply the fuction → deploy the function

Why This Matters

Accurate contributor documentation helps developers:

• Follow the correct coding style from the start
• Avoid unnecessary formatting changes in PRs
• Reduce failed formatting checks
• Improve the onboarding experience for new contributors

Testing

• Verified the .prettierrc file exists and matches the documented configuration
• No code logic changes — documentation only

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud