Refactor coroutine to improve type inference

[ghost]

Changed the coroutine function to use regular function instead of generator to Provide Better Type Checking

• [ ] This PR only introduces changes to documentation.
  • Please include a summary of changes and an explanation
• [ ] This PR adds new functionality
  • [ ] Is there a related issue?
  • Please note the related issue below, and how this PR relates to the issue if appropriate
  • [ ] Does the code style reasonably match the existing code?
  • [ ] Are the changes tested (using the existing format, as far as is possible?)
  • [ ] Are the changes documented in the readme with a suitable example?
  • [ ] Is the table of contents updated?
• [x] This PR introduces some other kind of change
  • Please explain the change below

Coroutine function has been changed to use a regular function instead of generator function. It would provide type intellisense while working with coroutines. New Usage is provide below.

Old Usage:

const p = coroutine(function*() {
      const firstPart = yield letters;
      const secondPart = yield digits;
      return {
        result: [firstPart, secondPart],
      };
    });

New Usage:

const p = coroutine(tokenize => {
      const firstPart = tokenize(letters);
      const secondPart = tokenize(digits);
      return {
        result: [firstPart, secondPart],
      };
    });