Rewrite maifetch in Rust

[aldorizona10-glitch]

Closes #1.

This rewrites maifetch from Go to Rust while preserving the main CLI behavior:

• Loads access token, score count, logo size, and config file from CLI/env/config.
• Supports README env vars (MAITEA_) and existing Go-style env vars (MAIFETCH_).
• Supports both -a and -t for access token compatibility.
• Fetches MaiTea profiles and recent plays with authenticated requests.
• Prints the same profile/recent score fields and supports disabling logo output with --logo-size 0.
• Uses reqwest with rustls-tls to avoid system OpenSSL requirements.

Validation run:

cargo build --release
./target/release/maifetch --help
./target/release/maifetch -a dummy --score-count 13 --logo-size 0

The last command verifies CLI parsing and validation without needing a real token.

[aldorizona10-glitch]

Follow-up on this bounty PR: the Rust rewrite builds successfully with cargo build --release and preserves the main CLI/config behavior, including MAITEA_* env vars from the README plus compatibility aliases for the existing Go-style config names. Happy to adjust anything around output parity or project structure if you want a narrower or more library-like split.