Replace tracing::warn!/info! with eprintln! in shutdown_sync() since
this function runs in atexit/Drop contexts where the tracing
dispatcher's TLS has already been destroyed by the Rust runtime.

…ll (#378)

Enable boxlite-cli distribution through two install paths:
- `cargo install boxlite-cli` (builds from source on crates.io)
- `cargo binstall boxlite-cli` (prebuilt binary from GitHub Releases)

Changes:
- Remove `publish = false`, sync version to workspace (0.7.3)
- Add workspace dependency for boxlite with version for crates.io
- Add `[package.metadata.binstall]` configuration
- Build CLI binary in CI (manylinux container + macOS)
- Package and upload CLI tarballs to GitHub Releases
- Add Tier 3 crates.io publish step for boxlite-cli
- Add version to runtime tarball names for consistency
- Update build.rs download URL to match new naming
- Add `cli:release` Makefile target
- Add `readme = "../README.md"` to boxlite crate (fixes empty crates.io page)

- Rust workspace: 0.7.3 → 0.7.4
- Python SDK: 0.7.3 → 0.7.4
- Node.js SDK: 0.4.1 → 0.4.2
- C SDK: inherits workspace version

…ng (#380)

* feat(publish): add build-c and build-go workflows for Go SDK publishing

Add CI workflows and tooling to publish the Go SDK via standard
`go get` + `go generate` + `go build` workflow:

- build-c.yml: builds C SDK (libboxlite.a, .dylib/.so, boxlite.h),
  packages per-platform archives, uploads to GitHub Releases
- build-go.yml: tests Go SDK with prebuilt library path, creates
  Go module tag (sdks/go/vX.Y.Z) on release for `go get`
- Split CGO directives into build-tagged files: prebuilt is the
  default (no tags needed), dev requires -tags boxlite_dev
- Add download tool (go generate) to fetch prebuilt libraries
  from GitHub Releases for end users

* fix(lint): pass boxlite_dev build tag to golangci-lint in CI

The default CGO directives (bridge_cgo_prebuilt.go) look for
lib/include/boxlite.h which only exists after go generate.
CI lint needs -tags boxlite_dev to use the repo header path,
matching what make lint:go already does locally.