thorvg-sys 0.1.0+thorvg-1.0.5

First release under the crate's own versioning. Supersedes the yanked
1.0.0 / 1.0.1 / 1.0.5, which mirrored the upstream ThorVG version
number 1:1 — a scheme abandoned because it left no room to publish
sys-crate-only changes (build system, bare-metal support) while upstream
stayed at 1.0.5. Bundles ThorVG 1.0.5.

Changed

• Versioning scheme — the crate version is now independent of
  upstream; the bundled ThorVG release is carried as +thorvg-X.Y.Z
  build metadata. The previous upstream-mirroring 1.0.x releases are
  yanked.

Build system

• Replaced the meson + ninja build with the cc crate — ThorVG is
  compiled from source via Cargo's configured (cross-)compiler; no meson
  or ninja required.
• Feature-gated loaders and capabilities — lottie, svg, png,
  fonts, expressions, threads, file-io Cargo features select
  which ThorVG components compile (all enabled by default; embedded users
  disable defaults and pick what they need).
• bindgen now passes an explicit --target= to libclang on host builds.

Bare-metal support (target_os = "none")

• Toolchain-agnostic cross-compilation pipeline, split into bare-metal
  vs. SDK-runtime policy.
• Vendors picolibc (submodule pinned to 1.8.11) as the libc on
  bare-metal: compile-time picolibc.h configuration plus a compile-only
  validation phase in build.rs.
• Per-concern runtime stubs welded to picolibc declarations with weak
  linkage; bridges newlib's __errno() to picolibc's plain errno;
  stubs _on_exit.
• RISC-V canonical-multilib selection; expressions enabled on
  bare-metal ESP32-C6.

Vendored ThorVG patches

• Local shims layered on ThorVG 1.0.5 to support bare-metal builds:
  a bsearch shim, a Lottie-loader shim extension, and runtime-stub
  welding across tvgLock.h, tvgInitializer.cpp, tvgRender.cpp,
  tvgSwRenderer.cpp, and tvgSwMemPool.cpp.