[psteinroe]

Stacked on #931.

Inlay hints could only be on or off. On calls whose arguments are column references or expressions, the parameter names mostly repeat what the code already says; on constants they're the useful part.

{ "inlayHints": { "parameterNames": "literals" } }

select make_point(1, -2), make_point(a + 1, b), greet('bob', null) from points;
-- "all" (default): make_point(x: 1, y: -2), make_point(x: a + 1, y: b), greet(name: 'bob', greeting: null)
-- "literals":      make_point(x: 1, y: -2), make_point(a + 1, b),       greet(name: 'bob', greeting: null)
-- "none":          no hints

I kept it to the three values TypeScript has (includeInlayParameterNameHints: "none" | "literals" | "all"). rust-analyzer only has an on/off switch, and an argument named like its parameter already gets no hint here, like TypeScript's ...WhenArgumentMatchesName default.

What changed

• inlayHints.parameterNames (all, literals, none) in the configuration, with schema, TS types and the editor features docs regenerated or updated.
• pgls_inlay_hints::ParameterNameHints, passed to inlay_hints_of_references and InlayHintsParams. A literal is one token that is a string, number, bit string, boolean or NULL, or a sign and a number. Casts like '1'::int and typed literals like date '...' don't count.
• pull_inlay_hints returns nothing for none, like for enabled: false.

Tests

Configuration deserialization (and rejecting unknown values), the crate's hints with literals, and a workspace test for all three values.