fix: use rest parameter in $ utility function to restore intended behavior

[AdityaM-IITH]

The $ utility function in block.js was broken during a refactor
from a standard function to an arrow function.

Arrow functions lack the arguments object, so the loop iterated over
an empty array and always returned [], silently ignoring all inputs.

Changes:

• Replace empty array iteration with rest parameter (...args)
• Function now correctly processes passed arguments as intended

Note: No current call sites found in the codebase. This PR fixes the
broken implementation for correctness — the function can be removed
entirely if deemed unnecessary.

[github-actions]

❌ Some Jest tests failed. Please check the logs and fix the issues before merging.

Failed Tests:

palette.test.js
logo.test.js
logoconstants.test.js

[AdityaM-IITH]

Rebased on latest master (83c5c8d). All 117 test suites passing locally.

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.