Managed to figure out how to use javascript on the plugin page by utilizing data-controller as found in other repos. Unsure how this is used, but appears to be how you can attach a js file to a div. Also implemented a basic state api to build off of in future.

Jellyfin.Plugin.MediaCleaner/Pages/media_cleaner_table.js

@@ -0,0 +1,27 @@
+var table = document.getElementById("seriesTable");
+
+
+
+const getMediaCleanerState = async () => {
+    const response = await fetch('/mediacleaner/state');
+
+    if(!response.ok){
+        throw new Error(`Response status: ${response.status}`)
+    }
+
+    return response.json();
+}
+
+var state = await getMediaCleanerState();
+
+console.log("State: ", state);
+
+for(let i = 0; i < state.length; i++){
+    var row = table.insertRow(-1);
+    var cell1 = row.insertCell(0);
+    var cell2 = row.insertCell(1);
+    var cell3 = row.insertCell(2);
+    cell1.innerHTML = state[i].Id;
+    cell2.innerHTML = state[i].SeriesName;
+    cell3.innerHTML = state[i].Seasons.length;
+}