Modify build process to disable code splitting

[mcmire]

Explanation

The code splitting feature in tsup breaks up source code into logical modules so that if a module is not being used it can be removed by a build tool that supports tree shaking.

However, the modules that tsup creates do not necessary match the files in the original source code, and tsup gives them a random name. This makes it frustrating for developers on a client team who are debugging a core package by inspecting the compiled version, because it is impossible to tell what a chunk file contains without first opening it up.

This commit thus configures tsup to disable the code splitting feature.

References

Fixes #4333.

Testing

• Run yarn build.
• Open up the dist directory for a package such as packages/assets-controllers.
• You shouldn't see any files named chunk-XXXX.js or chunk-XXXX.mjs.

Changelog

(Updated in PR.)

Checklist

• [x] I've updated the test suite for new or updated code as appropriate
• [x] I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• [x] I've highlighted breaking changes using the "BREAKING" category above as appropriate

[mcmire]

@metamaskbot publish-previews

[mcmire]

@metamaskbot publish-preview

[mcmire]

@metamaskbot publish-previews

[mcmire]

The repo is in a state of limbo currently because of a failed release. Once that gets resolved then I'll try creating preview builds again.

[mcmire]

I am going to close this PR, as we need code splitting for Snaps. ts-bridge is close to supporting monorepos anyway.