fix(core): params, error system, crypto

[rmlearney-digicatapult]

Wanted to help out by addressing the comments I raised.

This PR into your branch does the following:

• bump dependencies
• replace @stablelib/ed25519 with @noble/curves for better supported library aligning with existing @noble/hashes
• remove casts through unknown for type safety
• explicit switch-case returns, no fall-throughs

Bit bigger change to the internal error system:

• use string union DidResolutionError for all errors, no separate WebvhErrorCode
• remove InvalidDidUrl error class and exception-based control flow from resolver-result.ts
• remove representationNotSupported error (not in spec)
• string literal errors align to did-resolver output (JSON metadata)
• reject matrix params (not part of DID spec) and only accept query params
• non-throwing selector validation helper (validateSingleVersionSelector) with null or structured { code, detail } instead of previous assert
• no try/catch for selector errors

Test suite extended:

• tests for unknown query params and malformed percent encoding
• positive test for lowercase hex encoding

Note

Replace invalidDidUrl error code with invalidDid and migrate Ed25519 crypto to @noble/curves

• Replaces the invalidDidUrl and representationNotSupported error codes with invalidDid across the resolver, replacing the DidResolutionError enum with a 'invalidDid' | 'notFound' | 'internalError' string union type in src/interfaces.ts
• Adds validateSingleVersionSelector in src/resolver-result.ts to return a structured error instead of throwing when conflicting version selectors are supplied
• The webvh resolver in src/resolver.ts now rejects matrix-style version params, malformed percent-encoding, and unknown query parameters, all returning error='invalidDid'
• Replaces @stablelib/ed25519 with @noble/curves for Ed25519 signature verification in src/verifier.ts
• Risk: InvalidDidUrlError, WebvhErrorCode, and defaultVerifier are no longer exported from the package root; consumers relying on these or on invalidDidUrl error codes must update their code

^{Macroscope summarized 9193a84.}