alpha 3 (03b6b54 2026-08-27)

• 03b6b54f chore: track builtins_precompiled.js again
• dc41a1e9 selfhost: rm unused stubs
• 8d7dcba8 compiler: rm unused stuff
• 4809b464 log: rm
• 2e572ada various: rm unused flags
• 577d0a85 runtime: tweak help text
• ea0ee903 render: switch some stores to maps
• 170d8fe4 precompile: tweak huffman cursor
• d5e8c809 builtins/number: toString fast path
• 610e3636 builtins/string: stop fromCharCode over allocating
• da1bf2be selfhost: always regenerate pgo profile
• 6d60de25 chore: stop tracking builtins_precompiled.js
• 4e5945df render: use tabs not spaces