refactor(greeter): Update auth flows and add configurable opts

- Finally fix debug info logs before dms greeter loads
- prevent greeter/lockscreen auth stalls with timeout recovery and unlock-state sync

quickshell/Modules/Greetd/GreetdEnv.js

@@ -0,0 +1,20 @@
+.pragma library
+
+function readBoolOverride(envReader, names, fallbackValue) {
+    for (let i = 0; i < names.length; i++) {
+        const name = names[i];
+        const raw = envReader(name);
+        if (raw === undefined || raw === null || raw === "")
+            continue;
+
+        const normalized = String(raw).trim().toLowerCase();
+        if (normalized === "1" || normalized === "true" || normalized === "yes" || normalized === "on")
+            return true;
+        if (normalized === "0" || normalized === "false" || normalized === "no" || normalized === "off")
+            return false;
+
+        console.warn("Invalid boolean override for", name + ":", raw, "- trying next override/fallback");
+    }
+
+    return fallbackValue;
+}