perf: Cache AST so we only re-parse files which have changed

[jbencin-stacks]

Description

Cache AST by file content hash so that we don't

This will make VSCode extension more responsive as it won't re-parse the entire project on each save. It won't help clarinet check CLI command though

Fixes: #604

Breaking change?

No

[codecov]

Codecov Report

❌ Patch coverage is 48.97959% with 75 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
components/clarity-lsp/src/common/state.rs	25.80%	46 Missing ⚠️
components/clarity-lsp/src/common/backend.rs	33.33%	24 Missing ⚠️
components/clarinet-deployments/src/lib.rs	89.79%	5 Missing ⚠️

📢 Thoughts on this report? Let us know!

[hugo-stacks]

Hey @jbencin-stacks
Looks like it could help.
I see it's still in draft, while you're working on it, it would be nice to be able to bench the performance gains.

Additionally, I think it might be a similar concept as the existing pub active_contracts: HashMap<FileLocation, ActiveContractData>, that has no hash but maybe should have one.

If we would benefit from iterating on this existing data instead of adding a new cache.

I haven't look at these code path in a while, so that's just some thought that I have after a quick review