Extract manifest-schema and publish to crates-io

Motivation:

In cargo-bins/cargo-binstall#1720, I'd like to speedup cargo-binstall, by using the template recorded in taiki-e/install-action while utilise the checksum to validate the artifacts.

I've extracted all manifests I need into a crate named taiki-e-install-action-manifest-schema so that it could be publish it to crates-io

Cargo.toml

@@ -1,6 +1,6 @@
 [workspace]
 resolver = "2"
-members = ["tools/codegen"]
+members = ["tools/codegen", "tools/manifest-schema"]
 
 # This table is shared by projects under github.com/taiki-e.
 # It is not intended for manual editing.

tools/codegen/Cargo.toml

@@ -4,6 +4,7 @@ edition = "2021"
 default-run = "generate-manifest"
 
 [dependencies]
+taiki-e-install-action-manifest-schema = { version = "0.1.0", path = "../manifest-schema" }
 anyhow = "1"
 flate2 = "1"
 fs-err = "2"