Challenge #4: 🎄 Decorating the Christmas tree

It's time to put up the Christmas tree at home! 🎄 But this year we want it to be special. We're going to create a function that receives the height of the tree (a positive integer between 1 and 100) and a special character to decorate it.

The function should return a string that represents the Christmas tree, constructed as follows:

• The tree is made up of triangles of special characters.
• The spaces on the sides of the tree are represented with underscores _.
• All trees have a trunk of two lines, represented by the # character.
• The tree should always have the same length on each side.
• You must ensure the tree has the correct shape using line breaks \n for each line.

Examples:

const tree = createXmasTree(5, '*')
console.log(tree)
/*
____*____
___***___
__*****__
_*******_
*********
____#____
____#____
*/

const tree2 = createXmasTree(3, '+')
console.log(tree2)
/*
__+__
_+++_
+++++
__#__
__#__
*/

const tree3 = createXmasTree(6, '@')
console.log(tree3)
/*
_____@_____
____@@@____
___@@@@@___
__@@@@@@@__
_@@@@@@@@@_
@@@@@@@@@@@
_____#_____
_____#_____
*/

Make sure to use line breaks \n at the end of each line, except for the last one.