fix: CleanPath example + remove duplicate tests

CleanPath existed all along (path.go:118) — earlier grep had a stray
quote that hid it. Example now demonstrates actual behaviour:
redundant separator removal and .. resolution.

Removed duplicate CleanPath_Good test that conflicted with existing.

546 tests, all pass.

Co-Authored-By: Virgil <virgil@lethean.io>

path_example_test.go

@@ -26,3 +26,13 @@ func ExamplePathExt() {
 	// Output: .pdf
 }
 
+func ExampleCleanPath() {
+	fmt.Println(CleanPath("/tmp//file", "/"))
+	fmt.Println(CleanPath("a/b/../c", "/"))
+	fmt.Println(CleanPath("deploy/to/homelab", "/"))
+	// Output:
+	// /tmp/file
+	// a/c
+	// deploy/to/homelab
+}
+

path_test.go

@@ -109,3 +109,4 @@ func TestPath_PathDir_TrailingSlash(t *testing.T) {
 	result := core.PathDir("/Users/snider/Code/")
 	assert.Equal(t, "/Users/snider/Code", result)
 }
+