Feature: #99285 - Add Fluid TrimViewHelper

Description

A trim ViewHelper to trim strings is now available.

Possible sides are:

both Strip whitespace (or other characters) from the beginning and end of a string
left Strip whitespace (or other characters) from the beginning of a string
right Strip whitespace (or other characters) from the end of a string

#<f:format.trim>   String to be trimmed.   </f:format.trim>#

Results in the output:

#String to be trimmed.#

#<f:format.trim side="right">   String to be trimmed.   </f:format.trim>#

Results in the output:

#   String to be trimmed.#

#<f:format.trim characters=" St.">   String to be trimmed.   </f:format.trim>#

Results in the output:

#ring to be trimmed#

The new ViewHelper can be used in all new projects. There is no interference with any part of existing code.