Function: `UCFirst`

Transform the first letter of a string to uppercase or the first letter of each word, and optionally lowercase uppercase characters.

Method Signature

UCFirst(string=[string], doAll=[boolean], doLowerIfAllUppercase=[boolean])

Argument	Type	Required	Description	Default
`string`	`string`	`true`	The string to transform.
`doAll`	`boolean`	`false`	Boolean flag indicating whether to transform the first letter of each word.	`false`
`doLowerIfAllUppercase`	`boolean`	`false`	Boolean flag indicating whether to lowercase uppercase characters.	`false`