How to batch rotate text layers in place?

Please try this (updated): 

// rotate all type layers;
// 2023, use it at your own risk;
if (app.documents.length > 0) {
var theLayers = collectTypeLayers();
for (var m = 0; m < theLayers.length; m++) {
selectLayerByID(theLayers[m][1], false);
scaleRotateLayer (100, 180, 0, 0)
}
};
////////////////////////////////////
function collectTypeLayers () {
// the file;
var myDocument = app.activeDocument;
// get number of layers;
var ref = new ActionReference();
ref.putEnumerated( charIDToTypeID("Dcmn"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") ); 
var applicationDesc = executeActionGet(ref);
var theNumber = applicationDesc.getInteger(stringIDToTypeID("numberOfLayers"));
// process the layers;
var theLayers = new Array;
for (var m = 0; m <= theNumber; m++) {
try {
var ref = new ActionReference();
ref.putIndex( charIDToTypeID( "Lyr " ), m);
var layerDesc = executeActionGet(ref);
var layerSet = typeIDToStringID(layerDesc.getEnumerationValue(stringIDToTypeID("layerSection")));
var isBackground = layerDesc.getBoolean(stringIDToTypeID("background"));
// if not layer group collect values;
if (layerSet != "layerSectionEnd" && layerSet != "layerSectionStart" && isBackground != true && layerDesc.hasKey(stringIDToTypeID("textKey")) == true) {
var theName = layerDesc.getString(stringIDToTypeID('name'));
var theID = layerDesc.getInteger(stringIDToTypeID('layerID'));
theLayers.push([theName, theID])
};
}
catch (e) {};
};
return theLayers
};
// based on code by mike hale, via paul riggott;
function selectLayerByID(id,add){ 
add = undefined ? add = false:add 
var ref = new ActionReference();
    ref.putIdentifier(charIDToTypeID("Lyr "), id);
    var desc = new ActionDescriptor();
    desc.putReference(charIDToTypeID("null"), ref );
       if(add) desc.putEnumerated( stringIDToTypeID( "selectionModifier" ), stringIDToTypeID( "selectionModifierType" ), stringIDToTypeID( "addToSelection" ) ); 
      desc.putBoolean( charIDToTypeID( "MkVs" ), false ); 
   try{
    executeAction(charIDToTypeID("slct"), desc, DialogModes.NO );
}catch(e){
alert(e.message); 
}
};
////// scale active layer to canvas dimensions //////
function scaleRotateLayer (theScale, theAngle, offsetX, offsetY) {
try {
// scale layer:
var originalRulerUnits = app.preferences.rulerUnits;
app.preferences.rulerUnits = Units.PIXELS;
// transform;
var desc23 = new ActionDescriptor();
var ref2 = new ActionReference();
ref2.putEnumerated( charIDToTypeID( "Lyr " ), charIDToTypeID( "Ordn" ), charIDToTypeID( "Trgt" ) );
desc23.putReference( charIDToTypeID( "null" ), ref2 );
var idOfst = charIDToTypeID( "Ofst" );
var desc24 = new ActionDescriptor();
var idPxl = charIDToTypeID( "#Pxl" );
desc24.putUnitDouble( charIDToTypeID( "Hrzn" ), idPxl, offsetX );
desc24.putUnitDouble( charIDToTypeID( "Vrtc" ), idPxl, offsetY );
desc23.putObject( idOfst, idOfst, desc24 );
var idPrc = charIDToTypeID( "#Prc" );
desc23.putUnitDouble( charIDToTypeID( "Wdth" ), idPrc, theScale );
desc23.putUnitDouble( charIDToTypeID( "Hght" ), idPrc, theScale );
desc23.putUnitDouble( charIDToTypeID( "Angl" ), charIDToTypeID( "#Ang" ), theAngle );
desc23.putEnumerated( charIDToTypeID( "Intr" ), charIDToTypeID( "Intp" ), stringIDToTypeID( "bicubicAutomatic" ) );
desc23.putEnumerated( stringIDToTypeID( "freeTransformCenterState" ), stringIDToTypeID( "quadCenterState" ), stringIDToTypeID( "QCSAverage" ) );
//            desc23.putBoolean( charIDToTypeID( "Cpy " ), true );
executeAction( charIDToTypeID( "Trnf" ), desc23, DialogModes.NO );
app.preferences.rulerUnits = originalRulerUnits;
} catch (e) {}
};

We need to know whether text layers are one above another or scattered in the Layers panel. If you have text layers one above another in the Layers panel simple action can do the trick. You will need to select text layer then record step to rotate it. Record step to select next layer above. Duplicate those two steps as many times as you want then play action. If you have thousands layers then duplicate two steps hundred times and play action several times for example. It can be little tricky to not play action twice to the same layer so watch what is going on in the Layers panel.

There are some tricks you can use to avoid playing rotate on the same layer twice but that will require Conditional actions which are more advanced.

Here is example that provides a straightforward approach to automating tasks in Photoshop using a two-step action that can be duplicated as needed. For more complex actions, the use of Conditional actions or scripts may be necessary. I recommend reaching out to experienced scripters who can offer further assistance @Stephen Marsh @c.pfaffenbichler