Revamp achievements for 2024

[pil0u]

Summary of changes and context

• 52 files are just deletion related to old achievements being deleted
• 12 files are the new images for the achievements
• 5 files are random, simple, code cosmetic changes
• 3 files are a simple migration
• 2 files are only Rubocop-related

So the core logic of the PR is really in 11 files.

• Closes #662
• Display achievements on the stats page directly
• Revamp the view component of achievements, to manage 3 different states (locked, unlocked, unlocked by the user)
• Add achievements: fan, the_answer, doomed_sundays, influencer, the_godfather, belonging, mobster, jedi_master, madness, jeweler, snake_charmer, picasso
• Create a presenter dedicated to the stats page
• Clean up & remove all past achievements
• Closes #209

Sanity checks

• [x] Linters pass
• [x] Tests pass
• [x] Related GitHub issues are linked in the description
• [x] Merge conflicts are resolved

[pil0u]

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