Refactor Reconciler equality checks and enhance path handling

- Introduced a new `trueEquals` function in `trueEquals.lua` for shared value equality checks, improving consistency between `diff.lua` and `matching.lua`.
- Removed redundant equality logic from `diff.lua` and `matching.lua`, streamlining the codebase.
- Updated path handling in various test snapshots to ensure correct reference values, enhancing the accuracy of reconciliation tests.
- Implemented a post-processing step in `syncback` to fix `Rojo_Ref_*` attribute paths with correct dedup suffixes, improving path resolution.

These changes enhance the clarity and efficiency of the Reconciler's equality checks and path handling, paving the way for improved project management and user experience.

rojo-test/syncback-test-snapshots/end_to_end__tests__syncback__ref_properties-src__pointer.model.json5.snap

@@ -4,7 +4,7 @@ expression: src/pointer.model.json5
 ---
 {
   attributes: {
-    Rojo_Ref_Value: "ReplicatedStorage/target"
+    Rojo_Ref_Value: "target.model.json5"
   },
   className: "ObjectValue"
 }

rojo-test/syncback-test-snapshots/end_to_end__tests__syncback__ref_properties_blank-src__pointer.model.json5.snap

@@ -4,7 +4,7 @@ expression: src/pointer.model.json5
 ---
 {
   attributes: {
-    Rojo_Ref_Value: "ReplicatedStorage/target.txt"
+    Rojo_Ref_Value: "target.txt"
   },
   className: "ObjectValue"
 }

rojo-test/syncback-test-snapshots/end_to_end__tests__syncback__ref_properties_conflict-src__Pointer_2.model.json5.snap

@@ -4,7 +4,7 @@ expression: src/Pointer_2.model.json5
 ---
 {
   attributes: {
-    Rojo_Ref_Value: "ReplicatedStorage/Target_2"
+    Rojo_Ref_Value: "Target_2.model.json5"
   },
   className: "ObjectValue"
 }