Use c3 linearization in the MOP

[fare]

Runtime improvements

MOP:

• Use c3 linearization for class precedence list.
• Implement and use the C3 linearization algorithm for multiple inheritance.
• Unify struct fields and class slots, using struct inheritance then class precedence list for slot order. This improves on previous semantics, but introduces a slight incompatibility and will require updating the optimizer.
• Accordingly update various modules in std.

Also:

• Define defmutable in prelude.
• Add a (dump-backtrace?) parameter to control backtrace printing.
• Support build-manifest in the runtime.
• Move DBG macro in the runtime for past and future debugging.

Regenerate bootstrap.

[netlify[bot]]

✅ Deploy Preview for elastic-ritchie-8f47f9 ready!

Name	Link
🔨 Latest commit	43f6781055de3ca28e9f912b52da92e6cdad3e86
🔍 Latest deploy log	https://app.netlify.com/sites/elastic-ritchie-8f47f9/deploys/65b878d710dc500008b5a344
😎 Deploy Preview	https://deploy-preview-1033--elastic-ritchie-8f47f9.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[fare]

Builds upon the cli branch of #1027.

[fare]

PTAL

[fare]

PTAL

[fare]

PTAL. Victory?

[fare]

What's the plan to commit this? At the end of 0.18.2 so it requires only one regeneration of bootstrap that works with v0.18.1? At the beginning of 0.18.2 (=now) so we get to do all the followup PRs that take advantage of the new representation?

[vyzo]

I think it's good for v0.18.2

[fare]

PTAL

[fare]

PTAL