Implement the rest of CEL

[Flaque]

Overview

This PR adds support for the rest of CEL.

We @ sfcompute.com are interested in using CEL for ourselves, but would like a reasonable typescript implementation to exist.

So this PR hooks up the conformance tests from the CEL spec into a test framework, and then iteratively makes all of them pass.

It adds functionally every missing feature and resolves a lot of the edge cases from the existing implementation.

Apologies for the large PR!

Checklist before requesting a review

• I have performed a self-review of my code
• I have added tests (if possible)
• I have updated the readme (if necessary)
• I have updated the demo (if necessary)

[ChromeGG]

Whoa, what a wonderful PR!
I'll review & run it tomorrow morning (in 10h). Please fix the conflicts with main branch
Amazing job :)

[ChromeGG]

Please take care of these issues so I can proceed with the review:

1. Eslint Issues

There are 575 eslint problems (538 errors, 37 warnings). While not all of them are significant, a large portion is, such as:

const result: any = {} 
// can be
const result: Record<string, unknown> = {}

// no IF statements in the tests, etc.
// no unused variables

2. Code Formatting

Please run prettier on all the files to ensure they align with the repository conventions.

3. Comments

Please address the comments I left.

---

Also the visitor.ts becomes a monster (over 6k LOC). IDK if it's an issue but it can be hard to maintain. But I have no idea how to refactor it 😅 But it's just nice-to-have fix, not a blocker

[SksOp]

Hey i just saw this PR, I was about to open a few issues without knowing this exists. @Flaque are you still working on this? I also need this in my project and would like to know the progress and if you need some help.

[ChromeGG]

@SksOp I think there is no progress on it. You can fix the issue I listed above. Happy to merge it once it's resolved