Tidy up Cargo.toml to better support packaging

Closes #10622.

Cargo.toml

@@ -1,8 +1,6 @@
 [workspace]
 resolver = "2"
-members = [
-    "printf"
-]
+members = ["printf"]
 
 [workspace.package]
 rust-version = "1.70"
@@ -18,19 +16,30 @@ version = "0.1.0"
 edition.workspace = true
 rust-version.workspace = true
 default-run = "fish"
+# see doc_src/license.rst for details
+license = "GPL-2.0-only AND LGPL-2.0-or-later AND MIT AND PSF-2.0"
+repository = "https://github.com/fish-shell/fish-shell"
+homepage = "https://fishshell.com"
+readme = "README.rst"
 
 [dependencies]
-pcre2 = { git = "https://github.com/fish-shell/rust-pcre2", branch = "master", default-features = false, features = ["utf32"] }
+pcre2 = { git = "https://github.com/fish-shell/rust-pcre2", branch = "master", default-features = false, features = [
+    "utf32",
+] }
 
 bitflags = "2.5.0"
-errno = "0.3.9"
+errno = "0.3.0"
 lazy_static = "1.4.0"
 libc = "0.2.155"
 # lru pulls in hashbrown by default, which uses a faster (though less DoS resistant) hashing algo.
 # disabling default features uses the stdlib instead, but it doubles the time to rewrite the history
 # files as of 22 April 2024.
 lru = "0.12.3"
-nix = { version = "0.29.0", default-features = false, features = ["inotify", "resource", "fs"] }
+nix = { version = "0.29.0", default-features = false, features = [
+    "inotify",
+    "resource",
+    "fs",
+] }
 num-traits = "0.2.19"
 once_cell = "1.19.0"
 fish-printf = { path = "./printf" }