Language bindings, KDE thumbnails, yapf compare, in-memory encoding

- yapf_encode() / yapf_free_buffer(): encode to memory; yapf_save uses it
- yapf.c also compiles as C++
- `yapf compare`: size and decode speed of the original format vs YAPF,
  with a lossless check
- bindings with tested examples: C++ (header-only), C# (P/Invoke),
  Rust (crate, builds the C code), Go (cgo), Java (FFM API, Java 22+),
  Zig (@cImport), LuaJIT (FFI), TypeScript types for the JS port;
  Python now encodes in memory
- docs/LANGUAGES.md and examples/ with measured results
- KDE Dolphin thumbnail plugin (KF6, CMake)
- README: honest status for Photoshop / VS Code / Figma (not run in the
  apps yet) and macOS (cross-compiled only), platform table

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

bindings/rust/README.md

@@ -0,0 +1,18 @@
+# YAPF for Rust
+
+A crate that compiles the C library with the `cc` crate, so `cargo build`
+works on Windows, macOS and Linux with no extra steps.
+
+```toml
+[dependencies]
+yapf = { git = "https://github.com/Nexoniarz/YAPF" }
+```
+
+```rust
+let img = yapf::Image::load("texture.yapf")?;           // or Image::decode(&bytes)
+println!("{}x{}, {} channels", img.width, img.height, img.channels);
+yapf::Image::new(256, 256, 4, rgba).save("out.yapf")?;   // or .encode() → Vec<u8>
+```
+
+Example: `cargo run --release --example demo -- ../../other/YAPF.YAPF` ·
+tests: `cargo test`.