fix: print the trait and variant builders by name in a consumer's declarations - #116

…claration (#118)

Currently, `vp run ts-compatibility` searches the emitted `.d.ts` for
`/*elided*/`. That text search catches one way a declaration loses a
type. Compare the types themselves instead.

- For each export of the book's code samples and the fixtures, assert
that the source type and the type read back from its `.d.ts` are
identical:
  ```ts
  import type * as S0 from "../fixture-builders.js";
  import type * as D0 from "../dts/fixture-builders.js";
export type _0 = Expect<Equal<typeof S0.traitImpl, typeof
D0.traitImpl>>;
  ```
- `Equal` distinguishes `any` from every other type. Against the dist
before #116, `greetableBuilder`, whose declaration contains `/*elided*/
any`, fails on TypeScript 5.9, 6.0 and 7.0
- List the exports with the type checker from `typescript-5`. Compare a
generic type as a function of its parameters: `<T0>() => S0.Result<T0>`
- The repo's `scripts/` keep the `/*elided*/` search. Their classes
extend `ErrorFactory(…)`, and their declarations print the aliases of
`@praha/error-factory` expanded, which the comparison counts as a change
- Export `ByTag`, `Frame` and `VariantSupplied` from
`valof/internal/enum`. Currently, a consumer's declarations print them
expanded, so `Shape[Tag]`, `Shape.Circle`, and `Shape.Circle` after its
last step fail the comparison. The fixtures' declarations shrink from
36.8 kB to 33.8 kB. `index.d.ts` grows 0.02 kB

- Run the TypeScript lines concurrently, each emitting to `dts/<alias>`
and `round-trip/<alias>`. The reports print in the order of `aliases`

`vp run ts-compatibility` takes 5.2 s instead of 4.4 s locally.
Comparing the types costs 2.4 s per TypeScript line on 5.9 and 1.1 s on
7.0, mostly for the enum builders. With the lines run one after another,
it takes 9.1 s.