windowrules: rewrite completely (#12269)

Reworks the window rule syntax completely

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Co-authored-by: Mihai Fufezan <mihai@fufexan.net>

src/render/decorations/CHyprGroupBarDecoration.cpp

@@ -597,5 +597,5 @@ CBox CHyprGroupBarDecoration::assignedBoxGlobal() {
 
 bool CHyprGroupBarDecoration::visible() {
     static auto PENABLED = CConfigValue<Hyprlang::INT>("group:groupbar:enabled");
-    return *PENABLED && m_window->m_windowData.decorate.valueOrDefault();
+    return *PENABLED && m_window->m_ruleApplicator->decorate().valueOrDefault();
 }