Improve static parse error contextual summaries

Thanks @Hsiwe! https://github.com/arktypeio/arktype/pull/873

Fix a bug inferring certain recursive unions.

Previously, a scoped type like this failed to infer correctly. Thanks to @Vanilagy for the repro!

scope({
    a: {
        name: '"a"'
    },
    b: {
        name: '"b"',
        children: "(a|b)[]"
    }
})

Fixes a bug causing intersections including cross scope references to be inferred as unknown

Unfortunately, some cross-scope operations will still result in an error at runtime. You will know at build time if this occurs by a message in an intersection like "Unable to resolve alias 'myExternalAlias'". The workaround is to use the in-scope type parser as follows until next release for these scenarios:

Unions:

const $ = scope({
    a: "'abc'",
    b: { "c?": "a" }
})
const types = $.compile()
// This fails if you don't use scoped type for now, fixing in next release
const t = $.type([types.b, "|", { extraProp: "string" }])

Intersections:

const $ = scope({
    a: "'abc'",
    b: { "c?": "a" }
})
const types = $.compile()
// This fails if you don't use scoped type for now, fixing in next release
const t = $.type([types.b, "&", { extraProp: "string" }])