Refactor Reconciler tests and update path handling logic

- Updated test descriptions in `diff.spec.lua` and `diff.stress.spec.lua` to reflect changes in behavior regarding duplicate-named children in both real and virtual DOM contexts.
- Adjusted assertions to ensure that duplicate-named children are correctly removed or added based on the new matching logic.
- Refactored `hydrate.lua` and `matching.lua` to streamline the matching process by removing unnecessary parameters, enhancing clarity and maintainability.
- Updated metadata references in various test files to include the `.model.json5` extension for consistency in path handling.

These changes improve the accuracy of reconciliation tests and enhance the overall robustness of the Reconciler's path handling logic.

rojo-test/syncback-test-snapshots/end_to_end__rojo_test__syncback_util__child_but_not-stdout.snap

@@ -3,6 +3,8 @@ source: tests/rojo_test/syncback_util.rs
 expression: normalized_stdout
 ---
 Writing OnlyOneCopy/child_of_one.luau
+Writing ReplicatedStorage/OnlyOneCopy/child_of_one.luau
 Writing ReplicatedStorage/child_replicated_storage.luau
+Writing ReplicatedStorage/OnlyOneCopy
 Removing OnlyOneCopy/.gitkeep
 Removing ReplicatedStorage/.gitkeep

rojo-test/syncback-test-snapshots/end_to_end__rojo_test__syncback_util__rbxm_fallback-stdout.snap

@@ -2,8 +2,12 @@
 source: tests/rojo_test/syncback_util.rs
 expression: normalized_stdout
 ---
+Writing src/ChildWithDuplicates/DuplicateChild/.gitkeep
+Writing src/ChildWithDuplicates/DuplicateChild~1/init.meta.json5
 Writing src/ChildWithoutDuplicates/Child/.gitkeep
 Writing src/ChildWithDuplicates
+Writing src/ChildWithDuplicates/DuplicateChild
+Writing src/ChildWithDuplicates/DuplicateChild~1
 Writing src/ChildWithoutDuplicates
 Writing src/ChildWithoutDuplicates/Child
 Removing src/ChildWithDuplicates/.gitkeep

rojo-test/syncback-test-snapshots/end_to_end__rojo_test__syncback_util__respect_old_middleware-stdout.snap

@@ -4,5 +4,6 @@ expression: normalized_stdout
 ---
 Writing default.project.json5
 Writing src/model_json.model.json5
+Writing src/project_node.model.json5
 Writing src/rbxm.rbxm
 Writing src/rbxmx.rbxmx

rojo-test/syncback-test-snapshots/end_to_end__tests__syncback__duplicate_rojo_id-container.model.json5.snap

@@ -7,7 +7,7 @@ expression: container.model.json5
     {
       attributes: {
         Rojo_Id: "value_1",
-        Rojo_Ref_Value: "ReplicatedStorage/container/value_1"
+        Rojo_Ref_Value: "ReplicatedStorage/container/value_1.model.json5"
       },
       className: "ObjectValue",
       name: "value_1"
@@ -15,7 +15,7 @@ expression: container.model.json5
     {
       attributes: {
         Rojo_Id: "value_1",
-        Rojo_Ref_Value: "ReplicatedStorage/container/value_2"
+        Rojo_Ref_Value: "ReplicatedStorage/container/value_2.model.json5"
       },
       className: "ObjectValue",
       name: "value_2"

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"
+    Rojo_Ref_Value: "ReplicatedStorage/target.txt"
   },
   className: "ObjectValue"
 }

rojo-test/syncback-test-snapshots/end_to_end__tests__syncback__ref_properties_pruned-src__Pointer1.model.json5.snap

@@ -4,7 +4,7 @@ expression: src/Pointer1.model.json5
 ---
 {
   attributes: {
-    Rojo_Ref_Value: "ReplicatedStorage/Target1"
+    Rojo_Ref_Value: "ReplicatedStorage/Target1.model.json5"
   },
   className: "ObjectValue"
 }

rojo-test/syncback-test-snapshots/end_to_end__tests__syncback__ref_properties_pruned-src__Pointer2.model.json5.snap

@@ -4,7 +4,7 @@ expression: src/Pointer2.model.json5
 ---
 {
   attributes: {
-    Rojo_Ref_Value: "ReplicatedStorage/Target2"
+    Rojo_Ref_Value: "ReplicatedStorage/Target2.model.json5"
   },
   className: "ObjectValue"
 }

rojo-test/syncback-test-snapshots/end_to_end__tests__syncback__ref_properties_pruned-src__Pointer3.model.json5.snap

@@ -4,7 +4,7 @@ expression: src/Pointer3.model.json5
 ---
 {
   attributes: {
-    Rojo_Ref_Value: "ReplicatedStorage/Target3"
+    Rojo_Ref_Value: "ReplicatedStorage/Target3.model.json5"
   },
   className: "ObjectValue"
 }