Generate RegisteredNodes category unions; remove HAND_WRITTEN_UNIONS

[lorisleiva]

Teaches the generator a new union-emission mode for category unions whose registered<X> twin contains members the standalone <X> doesn't \u2014 i.e. the categories that use Rust's #[derive(RegisteredNodes)] registered/standalone split. New helpers in unions.ts: isRegisteredCategoryUnion decides when this mode applies (true for value/type/contextualValue, false for link/count/discriminator/pdaSeed); getRegisteredOnlyLeafKinds returns the #[registered]-only variants in spec order. A new registeredUnionPage.ts fragment renderer emits #[derive(RegisteredNodes)] #[node_union] pub enum Registered<X> { \u2026 #[registered] \u2026 }, with standalone variants alphabetical and #[registered] variants in spec order (functionally equivalent to the hand-written file). The orchestrator in index.ts dispatches to the registered renderer when applicable. With the generator now able to emit RegisteredValueNode (and, in future PRs, RegisteredTypeNode / RegisteredContextualValueNode), HAND_WRITTEN_UNIONS becomes empty and is deleted. The hand-written value_nodes/value_node.rs shrinks to a #[cfg(test)] mod tests block (the two kind_from_* smoke tests), and value_nodes/mod.rs drops the now-redundant pub use value_node::*;. As a small companion change, page.ts's import-grouping rule is generalised from "only crate::*" to "any shared module prefix" so the new use codama_nodes_derive::{node_union, RegisteredNodes}; is grouped automatically (no more special case for crate::*). The override surface is now down to three maps: CATEGORY_ROUTING, CATEGORY_DIRECTORIES, and FIELD_TYPE_OVERRIDES.

[lorisleiva]

• spec-generators: map float to crate::Number; remove FIELD_TYPE_OVERRIDES #104
• Generate Rust type nodes #103
• Generate Rust topLevel nodes (account, constant, error, event, instruction*, pda, program, root, …) #102
• Generate Rust enum shells from spec literalUnions #101
• Generate Rust enum shells from spec enumerations #100
• Generate contextualValue nodes; align Rust variant names with the derived rule #99
• Generate RegisteredNodes category unions; remove HAND_WRITTEN_UNIONS #98 👈 (View in Graphite)
• Derive inline-union allowlist from the spec; remove INLINE_UNIONS #97
• Rename Rust types to match spec; remove UNION_NAME_OVERRIDES + ENUMERATION_NAME_OVERRIDES #96
• Generate value nodes; introduce field-type override + hand-written-union skip #95
• Add inline-union support and complete pdaSeed generation #94
• Generate count and discriminator nodes #93
• Add JS spec generator for codama-nodes link nodes #92
• main

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[lorisleiva]

Merge activity

• Jun 10, 2:13 PM UTC: A user started a stack merge that includes this pull request via Graphite.
• Jun 10, 2:25 PM UTC: Graphite rebased this pull request as part of a merge.
• Jun 10, 2:25 PM UTC: @lorisleiva merged this pull request with Graphite.