feat(uuid): add Base32 parsing API

[memleakd]

Description
Added Uuid::fromBase32() as the matching parser for UUID values emitted with UuidWrapper::toBase32().

The package already supports converting UUIDs to Base32, but there was no explicit package-level API for parsing that representation back into a UUID. fromString() also supports ULIDs, which share the same 26-character Crockford Base32 shape, so using a dedicated method makes the caller’s intent clear: parse this value as a UUID Base32 value.

This keeps Base32 UUID parsing available through the package API and avoids requiring application code to use the underlying Symfony UID classes directly.

Example:

$uuid = service('uuid')->uuid7();
$base32 = $uuid->toBase32();
$parsed = service('uuid')->fromBase32($base32);

The change includes tests for uppercase input, lowercase input, and invalid input. The user guide was updated with a Base32 parsing example.

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[michalsn]

Thank you!