fix:loader-module-webpack

[admirsaheta]

Description

Fixes (issue #2807)

This PR addresses an issue with the webpack loader in @shopify/web-worker where output.chunkFilename could be either a string or a function returning a string.
The loader previously assumed it was always a string, leading to TypeError: file.includes is not a function errors.
The solution now checks if output.chunkFilename is a function and handles it correctly.

Changes Made

• Default Values: Default values [worker].js are provided for compiler.options.output.filename and compiler.options.output.chunkFilename in case they are undefined.
• Type Handling in addWorkerSubExtension:
• If file is a string, the function directly performs the replacement to add the .worker suffix.
• If file is a function, the function wraps it in another function that performs the replacement on its return value.

[admirsaheta]

Can we merge? @craigbrunner

[jesstelford]

@admirsaheta You'll need to add a Changeset before we can merge. Here's one I wrote up for you that you should be able to commit to your branch: https://github.com/Shopify/quilt/blob/680d20e75a1e3cab3a3206f9af90534ada9baade/.changeset/spicy-panthers-prove.md?plain=1

[admirsaheta]

Done, also added a check to avoid this from happening @jesstelford