ldd: lib paths resolve function

This is what always happens right after a ldd call, so implement it here.

Signed-off-by: Ophestra <cat@gensokyo.uk>

ldd/path.go

@@ -0,0 +1,21 @@
+package ldd
+
+import (
+	"path"
+	"slices"
+)
+
+// Path returns a deterministic, deduplicated slice of absolute directory paths in entries.
+func Path(entries []*Entry) []string {
+	p := make([]string, 0, len(entries)*2)
+	for _, entry := range entries {
+		if path.IsAbs(entry.Path) {
+			p = append(p, path.Dir(entry.Path))
+		}
+		if path.IsAbs(entry.Name) {
+			p = append(p, path.Dir(entry.Name))
+		}
+	}
+	slices.Sort(p)
+	return slices.Compact(p)
+}