Refresh Pokémon t-SNE post for Quarto

[jbkunst]

What

• restores the 2016 Pokémon visualization post in the current Quarto site
• preserves the original publication date and adds an italic July 2026 update note
• replaces obsolete data/sprite sources with maintained PokeAPI repositories
• modernizes the joins and replaces the old tsne package with Rtsne
• keeps the original bar chart → treemap → t-SNE storytelling
• enriches the data with capture rate, happiness, hatch counter, legendary/mythical flags, growth rate, color, shape, habitat, and generation
• upgrades the Highcharter tooltip with current artwork plus battle and species traits

Mixed-data preprocessing

• continuous variables are median-imputed and standardized
• binary flags remain 0/1 so rare values are not artificially amplified by z-scoring
• gender_rate = -1 is treated as genderless rather than as a numeric ratio
• nominal variables are one-hot encoded
• semantic feature blocks are normalized by 1 / sqrt(number of columns) to reduce dummy-count dominance
• block weights are explicit in the post code and default to 1 for easy review/sensitivity testing
• no arbitrary rarity score is created; capture rate and legendary/mythical flags are kept directly

Notes

• source-only change; generated docs/ output is intentionally not committed
• no empty commits
• statically reviewed, but not rendered in this environment because an R runtime is not available here