Photoshop relative asset alignment.

// 2023, use it at your own risk;
#target photoshop
if (app.documents.length > 0) {
    var theLayers = collectSelectedLayersBounds ();
    if (theLayers.length == 2) {
// set to pixels;
        var originalRulerUnits = app.preferences.rulerUnits;
        app.preferences.rulerUnits = Units.POINTS;
        moveLayer (theLayers[1][1], 0, theLayers[0][2][3] - theLayers[1][2][1]);
// reset;
        app.preferences.rulerUnits = originalRulerUnits;
    };
};
////// collect bounds of selected layers //////
function collectSelectedLayersBounds () {
// set to pixels;
    var originalRulerUnits = app.preferences.rulerUnits;
    app.preferences.rulerUnits = Units.POINTS;
// get selected layers;
    var selectedLayers = new Array;
    var ref = new ActionReference();
    ref.putEnumerated( charIDToTypeID("Dcmn"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
    var desc = executeActionGet(ref);
    if (desc.getBoolean(stringIDToTypeID("hasBackgroundLayer")) == true) {var theAdd =0}
    else {var theAdd = 1};
    if( desc.hasKey( stringIDToTypeID( 'targetLayers' ) ) ){
    desc = desc.getList( stringIDToTypeID( 'targetLayers' ));
    var c = desc.count;
    var selectedLayers = new Array();
    // run through selected layers;
    for(var i=0;i<c;i++){
    var theIndex = desc.getReference( i ).getIndex()+theAdd;
    // get id for solid color layers;
    try {
    var ref = new ActionReference();
    ref.putIndex( charIDToTypeID("Lyr "), theIndex ); 
    var layerDesc = executeActionGet(ref);
    var theName = layerDesc.getString(stringIDToTypeID('name'));
    var theIdentifier = layerDesc.getInteger(stringIDToTypeID ("layerID"));
    var theBounds = layerDesc.getObjectValue(stringIDToTypeID("bounds"));
    var theseBounds = [theBounds.getUnitDoubleValue(stringIDToTypeID("left")), theBounds.getUnitDoubleValue(stringIDToTypeID("top")), theBounds.getUnitDoubleValue(stringIDToTypeID("right")), theBounds.getUnitDoubleValue(stringIDToTypeID("bottom"))];
    selectedLayers.push([theName, theIdentifier, theseBounds]);
    } catch (e) {};
    };
    // if only one:
    }else{
    var ref = new ActionReference();
    ref.putEnumerated( charIDToTypeID("Lyr "), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
    var layerDesc = executeActionGet(ref);
    try {
    var theName = layerDesc.getString(stringIDToTypeID('name'));
    var theIdentifier = layerDesc.getInteger(stringIDToTypeID ("layerID"));
    var theBounds = layerDesc.getObjectValue(stringIDToTypeID("bounds"));
    var theseBounds = [theBounds.getUnitDoubleValue(stringIDToTypeID("left")), theBounds.getUnitDoubleValue(stringIDToTypeID("top")), theBounds.getUnitDoubleValue(stringIDToTypeID("right")), theBounds.getUnitDoubleValue(stringIDToTypeID("bottom"))];
    selectedLayers = [[theName, theIdentifier, theseBounds]]
    } catch (e) {};
    };
// reset;
    app.preferences.rulerUnits = originalRulerUnits;
    return selectedLayers;
};
////// based on code by mike hale and paul riggott //////
function selectLayerByID(index,add){ 
    add = undefined ? add = false:add 
    var ref = new ActionReference();
        ref.putIdentifier(charIDToTypeID("Lyr "), index);
        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); 
    }
};
////// move layer //////
function moveLayer (theID, hor, ver) {
	selectLayerByID(theID, false);
		var desc77 = new ActionDescriptor();
		var ref38 = new ActionReference();
		var idlayer = stringIDToTypeID( "layer" );
		ref38.putEnumerated( idlayer, stringIDToTypeID( "ordinal" ), stringIDToTypeID( "targetEnum" ));
	desc77.putReference( stringIDToTypeID( "null" ), ref38 );
	var idto = stringIDToTypeID( "to" );
		var desc78 = new ActionDescriptor();
		var idpixelsUnit = stringIDToTypeID( "pixelsUnit" );
		desc78.putUnitDouble( stringIDToTypeID( "horizontal" ), idpixelsUnit, hor );
		desc78.putUnitDouble( stringIDToTypeID( "vertical" ), idpixelsUnit, ver );
	desc77.putObject( idto, stringIDToTypeID( "offset" ), desc78 );
	executeAction( stringIDToTypeID( "move" ), desc77, DialogModes.NO );
	};

A Script could evaluate the position and bounds of the existing Layers but how would you define the relationships that determine which Layers should not overlap (and therefore be moved)? 

Why do you want to recreate functionality in Photoshop that apparently already exists in another application?