refactor(ast): simplify serializing SourceType

[overlookmotel]

#8919 fixed serialization of the Program::source_type field.

Remove the custom Serialize impl for this - use #[estree(flatten)] and #[estree(skip)] attributes to achieve the same thing. Also, remove extraneous TS type definitions for the parts of SourceType which aren't part of the ESTree AST.

[overlookmotel]

• refactor(ast): shorten code for impl Serialize for Elision #8940
• refactor(ast): introduce #[estree(ts_alias)] attr and use it on Elision #8939
• refactor(ast): shorten TS type definitions for enums #8938
• refactor(ast): simplify serializing literal types #8937
• refactor(ast): simplify serializing SourceType #8936 👈 (View in Graphite)
• feat(ast_tools/typescript): define fields inline for flattened types with only a single field #8935
• fix(ast_tools): do not flatten struct fields inline if fields are inaccessible from crate where Serialize impl is generated #8934
• refactor(ast_tools): remove Def::file_id method, add StructDef::file and EnumDef::file methods instead #8933
• main

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[overlookmotel]

cc @hi-ogawa. When I say "simplify", it's not actually simpler! But the complexity is moved into the codegen (previous PR), rather than in code around the AST itself. But that's in line with the DST approach, which we're aiming for.

[codspeed-hq]

CodSpeed Performance Report

Merging #8936 will not alter performance

_{Comparing 02-06-refactor_ast_simplify_serializing_sourcetype_ (c58f785) with main (1b89e75)}

Summary

✅ 33 untouched benchmarks

[hi-ogawa]

Nice! I didn't think of combining all macros 😮 I checked through your other refactoring and all make sense 👍

[graphite-app]

Merge activity

• Feb 6, 9:46 PM EST: A user added this pull request to the Graphite merge queue.
• Feb 6, 10:03 PM EST: A user merged this pull request with the Graphite merge queue.