Filter out storybooks in CoreGui (#220)

# Problem
When opening flipbook several warnings appear in the output from it
attempting to load Roblox-created storybooks in CoreGui
```
  12:37:42.545  Failed to load storybook CoreGui.RobloxGui.Modules.VoiceChatPrompt.VoiceChatPrompt.storybook. Error: table expected, got nil  -  Edit - useStorybooks:40
  12:37:42.545  Failed to load storybook CoreGui.RobloxGui.Modules.Settings.Settings.storybook. Error: table expected, got nil  -  Edit - useStorybooks:40
  12:37:42.545  Failed to load storybook CoreGui.RobloxGui.Modules.InGameChat.BubbleChat.BubbleChat.storybook. Error: table expected, got nil  -  Edit - useStorybooks:40
  12:37:42.545  Failed to load storybook CoreGui.RobloxGui.Modules.TopBar.TopBar.storybook. Error: table expected, got nil  -  Edit - useStorybooks:40
  12:37:42.545  Failed to load storybook CoreGui.RobloxGui.Modules.ContactList.ContactList.storybook. Error: table expected, got nil  -  Edit - useStorybooks:40
```

# Solution

To fix this, I've updated `isStorybookModule` to return `false` for any
storybook in CoreGui

Closes #218 

# Checklist

- [x] Ran `./bin/test.sh` locally before merging

---------

Co-authored-by: pashleyy <[email protected]>

src/Story/isStorybookModule.lua

@@ -1,9 +1,13 @@
 local flipbook = script:FindFirstAncestor("flipbook")
 
+local CoreGui = game:GetService("CoreGui")
+
 local constants = require(flipbook.constants)
 
 local function isStorybookModule(instance: Instance): boolean
-	return instance:IsA("ModuleScript") and instance.Name:match(constants.STORYBOOK_NAME_PATTERN) ~= nil
+	return instance:IsA("ModuleScript")
+		and instance.Name:match(constants.STORYBOOK_NAME_PATTERN) ~= nil
+		and not instance:IsDescendantOf(CoreGui)
 end
 
 return isStorybookModule

src/Story/isStorybookModule.spec.lua

@@ -1,4 +1,6 @@
 return function()
+	local CoreGui = game:GetService("CoreGui")
+
 	local isStorybookModule = require(script.Parent.isStorybookModule)
 
 	it("should return true for ModuleScripts with the .storybook extension", function()
@@ -28,4 +30,14 @@ return function()
 
 		expect(isStorybookModule(storybook)).to.equal(false)
 	end)
+
+	it("should return false for storybooks in CoreGui", function()
+		local storybook = Instance.new("ModuleScript")
+		storybook.Name = "Foo.storybook"
+		storybook.Parent = CoreGui
+
+		expect(isStorybookModule(storybook)).to.equal(false)
+
+		storybook:Destroy()
+	end)
 end

wally.toml

@@ -9,7 +9,7 @@ exclude = ["*"]
 [dependencies]
 Roact = "roblox/[email protected]"
 React = "jsdotlua/[email protected]"
-ReactRoblox = "jsdotlua/[email protected].1"
+ReactRoblox = "jsdotlua/[email protected].2"
 Sift = "csqrl/[email protected]"
 t = "osyrisrblx/[email protected]"
 ModuleLoader = "flipbook-labs/[email protected]"