feat(ast_tools/typescript): define fields inline for flattened types with only a single field

[overlookmotel]

Where a type has only a single field (not including fields which are skipped), and the child type is flattened, don't extend the child type, just inline that one field into the parent's type definition.

[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
• feat(ast_tools/typescript): define fields inline for flattened types with only a single field #8935 👈 (View in Graphite)
• 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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Merge activity

• Feb 6, 9:46 PM EST: A user added this pull request to the Graphite merge queue.
• Feb 6, 10:01 PM EST: A user merged this pull request with the Graphite merge queue.