add event node support

[daog1]

Summary

I added this while making dynamic-parsers support full Anchor-format parsing, and I want to upstream the base event support first so that work can stay aligned with main.

This PR adds EventNode support across the core packages and imports Anchor events into the program AST.

A follow-up change depends on this.

Changes

• add EventNode to node types and node constructors
• add ProgramNode.events
• import Anchor v0.1 events
• avoid duplicating event structs in definedTypes
• update core visitors for eventNode
• add tests

Validation

• pnpm lint
• pnpm test

[changeset-bot]

🦋 Changeset detected

Latest commit: af23064

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 12 packages

Name	Type
@codama/errors	Minor
@codama/node-types	Minor
@codama/nodes-from-anchor	Patch
@codama/nodes	Minor
@codama/visitors-core	Minor
@codama/dynamic-codecs	Patch
@codama/dynamic-parsers	Patch
codama	Minor
@codama/renderers-core	Patch
@codama/validators	Minor
@codama/visitors	Minor
@codama/cli	Patch

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[lorisleiva]

Thanks, I've made some important comments but this is a solid base. I'll give it another thorough review after these are addressed.

[lorisleiva]

Thanks! Another round of comments. 🙏

[lorisleiva]

Nice, thank you! Just a quick nit and I think we're good to go.

[lorisleiva]

Thanks! I've just noticed we don't have a documentation page for the new node though. Would you mind adding one under packages/nodes/docs/ErrorNode.md? There should be a _template.md file to help with that. Additionally, the ProgramNode.md page needs updating and so does the main packages/nodes/README.md.

Another thing that would be good to update is the getDefinedTypeHistogramVisitor to ensure it tracks link usages inside event nodes as well.

[daog1]

Thanks! I've just noticed we don't have a documentation page for the new node though. Would you mind adding one under packages/nodes/docs/ErrorNode.md? There should be a _template.md file to help with that. Additionally, the ProgramNode.md page needs updating and so does the main packages/nodes/README.md.

Another thing that would be good to update is the getDefinedTypeHistogramVisitor to ensure it tracks link usages inside event nodes as well.

Added and updated.

[lorisleiva]

Thank you! 🚀