docs: sync the wiki with zero_layer after the maintenance pass - repository links now point at polpo21 (renamed from supercosti21) - license is MIT, not GPL v3 - Rust 1.90+, 357 tests, selfupdate.rs file name, retry delays - self-update picks the matching gnu/musl build and verifies SHA256SUMS - document how ELF files are classified as executables or libraries Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
docs: add full wiki (14 pages)