[TASK] Migrate CSH description into TCA column property description (#33)

see: https://docs.typo3.org/m/typo3/reference-coreapi/12.4/en-us/ApiOverview/ContextSensitiveHelp/

Author: chriwo

Configuration/TCA/tx_variables_marker.php

@@ -119,6 +119,7 @@
         'marker' => [
             'exclude' => 0,
             'label' => 'LLL:EXT:variables/Resources/Private/Language/locallang_db.xlf:tx_variables_marker.marker',
+            'description' => 'LLL:EXT:variables/Resources/Private/Language/locallang_db.xlf:tx_variables_marker.marker.description',
             'l10n_mode' => 'exclude',
             'config' => [
                 'type' => 'input',
@@ -130,6 +131,7 @@
         'replacement' => [
             'exclude' => 0,
             'label' => 'LLL:EXT:variables/Resources/Private/Language/locallang_db.xlf:tx_variables_marker.replacement',
+            'description' => 'LLL:EXT:variables/Resources/Private/Language/locallang_db.xlf:tx_variables_marker.replacement.description',
             'config' => [
                 'type' => 'text',
                 'cols' => 40,

Resources/Private/Language/locallang_csh_tx_variables_marker.xlf

@@ -9,9 +9,15 @@
 			<trans-unit id="tx_variables_marker.marker">
 				<source>Marker:</source>
 			</trans-unit>
+			<trans-unit id="tx_variables_marker.marker.description">
+				<source>The marker you want to replace in your page. Will be automatically converted to upper case. Do not put the double curly brackets {{ ... }}.</source>
+			</trans-unit>
 			<trans-unit id="tx_variables_marker.replacement">
 				<source>Replacement Text:</source>
 			</trans-unit>
+			<trans-unit id="tx_variables_marker.replacement.description">
+				<source>The replacement text for the marker. You may reference other markers by enclosing them into double curly brackets {{ ... }}.</source>
+			</trans-unit>
 		</body>
 	</file>
 </xliff>