feat(iid): add canonical IID parsing and derivation

[kamescg]

Summary

P02 of the iid-v1.1.0-alpha release train. Adds @0xintuition/iid — the pure, offline IID reference implementation: parsing, typed validation, all 26 scheme canonicalizers, NORM-1, gen1 derivation, and the new declarative identity-ladder engine.

Ported from the authoritative private reference (0xIntuition/intuition-v2 @ 8b9e9aa11), with two deliberate design changes over the private code:

1. Declarative ladders replace executable callbacks. The public ladder contract is the serializable source/recipe union the public classifications package already declares (field, same-as, url-origin, geohash, podcast-guid, named derivations acct-strong/acct-weak/appid-bundle/rss-item/termset-term/caip10-eoa/caip10-contract/caip19-erc20; recipe fields field/year/text-hash/geohash). The engine interprets them as a pure function; no engine for these existed anywhere before this PR. Field keys per derivation are documented on the engine and frozen. same-as selection is order-independent (lexicographically smallest canonical wins).
2. The parser matches the spec grammar. Value character class is now %x21-7E — space/non-ASCII values reject as malformed. The private parser's catch-all was recorded in iid-spec's implementation-notes; the two normative parse vectors it failed now pass.

Also adds the typed result API the plan calls for: inspectIntuitionId distinguishes malformed / unknown-scheme / noncanonical (with canonical repair for read paths — resolvable historical spellings are never valid new anchors) and reports anchor-ineligibility reasons (class-c vs polymorphic-scheme).

Package impact

Package	Change
@0xintuition/iid	new, 0.1.0-alpha.0
all existing packages	none

Target versions

@0xintuition/iid@0.1.0-alpha.0. Peer: viem ^2.0.0. Dev: exact @0xintuition/iid-spec@0.1.0-alpha.0 (conformance corpus input).

Identity impact

Identity impact: none — no existing golden bytes change. All spec-stated golden values reproduce exactly (ISBN-10→13 upconversion, gen1 movie r4 fb681afe…, golden ISRC).

Fixture impact

none added; the full 145-vector corpus from @0xintuition/iid-spec executes in this package's tests (212 tests, Node via vitest; the clean-room smoke covers Bun).

Contract artifact

n/a

Rollout notes

• Gate results: all conformance vectors pass; parsing preserves everything after the second colon (colon-bearing CAIP-10/gen1 vectors); packed tarball exposes only . and ./package.json entrypoints with compiled output; 12-package clean-room smoke passes on Node+Bun.
• P03 next: classifications drops its duplicated scheme-class/typing tables and ladder types in favor of imports from this package (temporary re-exports for compatibility).

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