fix(prepare): handle scoped tag prefixes in auto version resolution

[BYK]

Problem

resolveVersion() in prepare.ts fails to extract the semver from git tags that use scoped prefixes like @spotlightjs/spotlight@4.10.0. The manual regex only handles v-prefixed (v1.2.3) and bare (1.2.3) tags:

const currentVersion =
  latestTag && latestTag.replace(/^v/, '').match(/^\d/)
    ? latestTag.replace(/^v/, '')
    : '0.0.0';

For @spotlightjs/spotlight@4.10.0, .replace(/^v/, '') is a no-op and .match(/^\d/) returns null, so it falls through to '0.0.0'. This causes auto version to resolve as 0.1.0 instead of 4.11.0.

Fix

Replace the manual regex with the existing getVersion() utility from utils/version.ts, which correctly extracts semver from any string using a proper regex:

const currentVersion = (latestTag && getVersion(latestTag)) || '0.0.0';

Adds a test case for scoped package tag extraction.