Update deduplication logic and documentation for suffix handling

- Removed the `luau` dependency from `rokit.toml`.
- Updated deduplication logic to append `~2`, `~3`, etc. instead of `~1`, `~2` for naming collisions in various files, ensuring consistent suffix management.
- Adjusted comments and documentation across multiple files to reflect the new suffix handling rules.
- Added new test cases to validate the updated deduplication behavior, ensuring accurate naming for instances with collisions.

These changes enhance the clarity and functionality of the deduplication process, improving overall consistency in naming conventions.

plugin/src/PatchTree.lua

@@ -79,8 +79,9 @@ function Tree.new()
 	local tree = {
 		idToNode = {},
 		ROOT = {
+			id = "ROOT",
 			className = "DataModel",
-			name = "ROOT",
+			name = "game",
 			children = {},
 		},
 	}
@@ -209,6 +210,41 @@ function Tree:buildAncestryNodes(previousId: string?, ancestryIds: { string }, p
 	end
 end
 
+local function computeRootChangeInfo(tree)
+	local totalLinesAdded = 0
+	local totalLinesRemoved = 0
+	local totalPropChanges = 0
+	local hasLineData = false
+
+	tree:forEach(function(node)
+		if not node.changeInfo then
+			return
+		end
+		if node.changeInfo.linesAdded then
+			totalLinesAdded += node.changeInfo.linesAdded
+			hasLineData = true
+		end
+		if node.changeInfo.linesRemoved then
+			totalLinesRemoved += node.changeInfo.linesRemoved
+			hasLineData = true
+		end
+		if node.changeInfo.propChanges then
+			totalPropChanges += node.changeInfo.propChanges
+		end
+	end)
+
+	if not hasLineData and totalPropChanges == 0 then
+		return nil
+	end
+
+	return {
+		linesAdded = if hasLineData then totalLinesAdded else nil,
+		linesRemoved = if hasLineData then totalLinesRemoved else nil,
+		isWhitespaceOnly = false,
+		propChanges = if totalPropChanges > 0 then totalPropChanges else nil,
+	}
+end
+
 local PatchTree = {}
 
 -- Builds a new tree from a patch and instanceMap
@@ -482,6 +518,8 @@ function PatchTree.build(patch, instanceMap, changeListHeaders, gitMetadata)
 	end
 	Timer.stop()
 
+	tree.ROOT.changeInfo = computeRootChangeInfo(tree)
+
 	Timer.stop()
 	return tree
 end
@@ -653,6 +691,8 @@ function PatchTree.updateMetadata(tree, patch, instanceMap, unappliedPatch)
 	end)
 	Timer.stop()
 
+	tree.ROOT.changeInfo = computeRootChangeInfo(tree)
+
 	Timer.stop()
 	return tree
 end