Add package metadata for crates.io publishing

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: gfx

Cargo.toml

@@ -3,7 +3,11 @@
 name = "fpfmt"
 version = "0.1.0"
 edition = "2024"
+description = "Floating-point formatting and parsing, ported from rsc/fpfmt"
+license = "BSD-3-Clause"
+repository = "https://github.com/wado-lang/fpfmt"
 autotests = false
+exclude = ["tools/", "tests/"]
 
 [workspace]
 members = [".", "tools/pow10gen", "tools/bench", "tools/wasm-size"]