Write a dozen test cases for the ANSI Common Lisp STRING-EQUAL function.

    Test the function with two empty strings as arguments:
    (string-equal "" "") => T

    Test the function with two strings that contain the same characters but have different cases:
    (string-equal "Hello" "hello") => NIL

    Test the function with two strings that contain different characters:
    (string-equal "Hello" "world") => NIL

    Test the function with two strings that are the same except for leading and trailing white space:
    (string-equal " Hello " "Hello") => T

    Test the function with two strings that are the same except for leading and trailing non-printing characters:
    (string-equal " Hello " " Hello ") => T

    Test the function with two strings that are the same except for an accented character in one of them:
    (string-equal "Hello" "Héllo") => NIL

    Test the function with two strings that are the same except for an emoji in one of them:
    (string-equal "Hello" "Hello 😊") => NIL

    Test the function with two strings that contain the same characters but in a different order:
    (string-equal "Hello" "olleH") => NIL

    Test the function with two strings that are the same except for a single character:
    (string-equal "Hello" "Hellp") => NIL

    Test the function with two strings that are the same except for an extra character at the beginning:
    (string-equal "Hello" "xHello") => NIL

    Test the function with two strings that are the same except for an extra character at the end:
    (string-equal "Hello" "Hellox") => NIL

    Test the function with two strings that are the same except for a single character in the middle:
    (string-equal "Hello" "Hexllo") => NIL

STRING-EQUAL also takes symbols as arguments, write some tests for that feature.

    Test the function with two symbols that contain the same characters:
    (string-equal 'hello 'hello) => T

    Test the function with two symbols that contain the same characters but have different cases:
    (string-equal 'Hello 'hello) => NIL

    Test the function with two symbols that contain different characters:
    (string-equal 'Hello 'world) => NIL

    Test the function with a symbol and a string that contain the same characters:
    (string-equal 'Hello "Hello") => T

    Test the function with a symbol and a string that contain the same characters but have different cases:
    (string-equal 'Hello "hello") => NIL

    Test the function with a symbol and a string that contain different characters:
    (string-equal 'Hello "world") => NIL

    Test the function with a symbol and a string that contain the same characters except for leading and trailing white space:
    (string-equal ' Hello "Hello") => T

    Test the function with a symbol and a string that contain the same characters except for an accented character in one of them:
    (string-equal 'Hello "Héllo") => NIL

    Test the function with a symbol and a string that contain the same characters except for an emoji in one of them:
    (string-equal 'Hello "Hello 😊") => NIL

    Test the function with a symbol and a string that contain the same characters but in a different order:
    (string-equal 'Hello "olleH") => NIL

    Test the function with a symbol and a string that contain the same characters except for a single character:
    (string-equal 'Hello "Hellp") => NIL

    Test the function with a symbol and a string that contain the same characters except for a single character in the middle:
    (string-equal 'Hello "Hexllo") => NIL