Feature: #67658 - Introduce DataProcessors for splitting values

See Issue #67658

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>