add release workflow and support for binstall for sqlx cli

[bnjjj]

Add cargo-binstall support for sqlx-cli

The motivation behind this PR is to avoid in every CI builds to re-compile the sqlx cli and wait for 6' for every builds.

This PR will allow users to install sqlx-cli pre-built binaries via cargo binstall sqlx-cli instead of compiling from source.

Changes

sqlx-cli/Cargo.toml — adds [package.metadata.binstall] metadata:

• Defines the release asset URL template pointing to GitHub releases
• Sets .tgz as the default archive format, with a .zip override for Windows
• Maps both sqlx and cargo-sqlx binaries to the archive root

.github/workflows/release.yml — new workflow triggered on version tags (v*..):

• Builds sqlx and cargo-sqlx for all four supported targets (x86_64-unknown-linux-musl, x86_64-pc-windows-msvc, x86_64-apple-darwin, aarch64-apple-darwin)
• Packages each target into a sqlx-cli-v{version}-{target}.tgz / .zip archive containing both binaries
• Creates a GitHub release with auto-generated notes and all archives attached

Usage

Once a release tag is pushed:

  cargo binstall sqlx-cli

Does your PR solve an issue?

fixes #1201

Is this a breaking change?

No

[eirnym]

I would prefer if taiki-e/upload-rust-binary-action (without upload part) to be used, as phantom target universal-apple-darwin could be used.