feat:Added DrawLineDashed() and example.

[luis605]

I added a new function to raylib's API called DrawLineDashed(). This function takes the following arguments:

Vector2 startPos    // 2D coordinate that tells where the line starts
Vector2 endPos      // 2D coordinate that tells where the line must end
int dashSize        // The length of each dash
int whiteSpaceSize  // The space between each dash
Color color         // The color of the dash

This new functions draws a line with interrupted spaces which can be useful to highlight text or draw UI borders.

Additionally, a new example that shows how to use this new function was also written. The example allows the user to modify the line properties at runtime and play with it.

Areas that must be reviewed:

• Function argument names. Clarity can be improved.
• Possible new argument: lineWidth.
• Missing optimization opportunities and possible edge cases or security vulnerabilities I may have missed.

[raysan5]

@luis605 Thanks! Nice addition!