fix: use year-based slug matching for Metacritic (fixes wrong matches for X 2022)

[RePacked]

⚠️ DISCLAIMER: This fix was created with the help of ChatGPT.
I am not a developer, and I have only tested it locally with the movie X (2022).
Further review and testing by maintainers is required before merging.

---

What

Fix Metacritic provider to try year-specific slugs first (e.g., /movie/x-2022), then fall back to plain slug, then a secondary year suffix. This avoids landing on the wrong film for ambiguous titles.

Why

Movies with shared names (e.g., X (2022)) were resolving to incorrect Metacritic pages when the URL lacked the year, causing wrong or missing ratings.

How

• Build candidate URLs in order of likelihood:
  1. ${BASE_URL}/${mediaType}/${slug}-${year}
  2. ${BASE_URL}/${mediaType}/${slug}
  3. ${BASE_URL}/${mediaType}/${slug}-${year}-2
• Try each until a 200 response and valid scores are found.
• Derive year from streamInfo.year (or streamInfo.date upstream).

Impact

• Correct Metacritic links and values for ambiguous titles.
• Also ensures year is consistently passed through, which may indirectly improve other providers.

Testing

• Verified locally on: X (2022) (IMDb tt13560574).
• Maintainers should test further before merging.

Files

• src/providers/metacritic.js (slug logic + multi-URL attempts)