chore: add Grit node compilers

[arendjr]

Summary

This provides most of the node compilers which compile syntax nodes produced by our Grit parser into Grit pattern data structures on which the pattern matching algorithm operates.

It's a sizable chunk of code at once, but these represent relatively straight-forward ports of node compilers as found in the Marzano engine. See here for a reference on which this is based: https://github.com/getgrit/gritql/tree/main/crates/core/src/pattern_compiler

The main differences are:

• Rather than compiling from TreeSitter nodes, we compile from the CST produces by our own parser. An advantage we have is that our CST has much stricter typing than TreeSitter, which saves some code and helps me make sure I didn't miss anything :)
• I added a few comments here and there, although I will admit docs are scarce here. Fortunately individual node compilers are very low on complexity, though I'd like to document the variable compiler a bit more.
• We produce typed errors instead of using anyhow for everything.

This represents some more progress towards #2582

Test Plan

None yet, since this doesn't yet provide much of use on its own. Once the other bindings are complete, I can work towards pattern tests.

[codspeed-hq]

CodSpeed Performance Report

Merging #2689 will improve performances by 17.75%

_{Comparing arendjr:grit-node-compilers (c6ec477) with main (2207d75)}

Summary

⚡ 1 improvements
✅ 87 untouched benchmarks

Benchmarks breakdown

	Benchmark	main	arendjr:grit-node-compilers	Change
⚡	eucjp.json[uncached]	5.8 ms	4.9 ms	+17.75%