group based on category instead of method name

ccp/js/methodlistcontroller.js

@@ -188,11 +188,18 @@ class CCPMethodList extends HTMLElement{
     
     groupBy(){
       this.#filtered = this.#filtered.reduce((catalog, meth)=>{
-        const category = meth.title
+        const categories = meth.metadata.filter(md=>md.role === "category").map(c=>c.title)
+        if(categories.length === 0){
+          catalog["Uncategorized"].push(meth)
+        }else{
+          for(let c in categories){
+            const category = categories[c]
             catalog[category] = catalog[category] ?? []
             catalog[category].push(meth)    
+          }
+        }
         return catalog
-      }, {})
+      }, { "Uncategorized" : []})
     }
     
     getCategoryHints(){