add sorting; implement sort criteria in default repo ; adding html header

internal/data/ISearchCriteria.go

@@ -1,6 +1,6 @@
 package data
 
 // TODO docstring
-type ISearchCriteria[T any] interface {
-    Matches(t T) bool
+type ISortCriteria[T any] interface {
+    Weight(t T) int
 }