Feature: #67658 - Introduce DataProcessors for splitting values

Description

Two new DataProcessors are added to allow flexible processing for comma-separated values. To use e.g. with the FLUIDTEMPLATE content object.

The SplitProcessor allows to split values separated with a delimiter inside a single database field into an array to loop over it.

The CommaSeparatedValueProcessor allows to split values into a two-dimensional array used for CSV files or tt_content records of CType "table".

Using the SplitProcessor the following scenario is possible:

page.10 = FLUIDTEMPLATE
page.10.file = EXT:site_default/Resources/Private/Template/Default.html
page.10.dataProcessing.2 = TYPO3\CMS\Frontend\DataProcessing\SplitProcessor
page.10.dataProcessing.2 {
	if.isTrue.field = bodytext
	delimiter = ,
	fieldName = bodytext
	removeEmptyEntries = 1
	filterIntegers = 1
	filterUnique = 1
	as = keywords
}

In the Fluid template then iterate over the split data:

<f:for each="{keywords}" as="keyword">
	<li>Keyword: {keyword}</li>
</f:for>

Using the CommaSeparatedValueProcessor the following scenario is possible:

page.10 = FLUIDTEMPLATE
page.10.file = EXT:site_default/Resources/Private/Template/Default.html
page.10.dataProcessing.4 = TYPO3\CMS\Frontend\DataProcessing\CommaSeparatedValueProcessor
page.10.dataProcessing.4 {
	if.isTrue.field = bodytext
	fieldName = bodytext
	fieldDelimiter = |
	fieldEnclosure =
	maximumColumns = 2
	as = table
}

In the Fluid template then iterate over the processed data:

<table>
	<f:for each="{table}" as="columns">
		<tr>
			<f:for each="{columns}" as="column">
				<td>{column}</td>
			</f:for>
		<tr>
	</f:for>
</table>