Complete #469 - new function asserGuard().

[samchon]

Added new function typia.assertGuard<T>() function which performs the assertion guard of TypeScript.

export function assertGuard<T>(input: unknown): asserts input is T;
export function assertGuardEquals<T>(input: unknown): asserts input is T;

export function createAssertGuard<T>(): AssertionGuard<T>;
export function createAssertGuardEquals<T>(): AssertionGuard<T>;

export type AssertionGuard<T> = (input: unknown) => asserts input is T;

[samchon]

No problem on the test automation program.