feat: initial release of ucobs 0.1.0

μCOBS — Consistent Overhead Byte Stuffing encoder/decoder.
no_std, zero-alloc, spec-compliant (Cheshire & Baker 1999).
44 tests + doctests, property-based testing, fuzz targets,
cross-validation against corncobs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

README.md

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+# μCOBS
+
+[![crates.io](https://img.shields.io/crates/v/ucobs.svg)](https://crates.io/crates/ucobs)
+[![docs.rs](https://docs.rs/ucobs/badge.svg)](https://docs.rs/ucobs)
+[![license](https://img.shields.io/crates/l/ucobs.svg)](LICENSE)
+
+**The** COBS implementation for Rust.
+
+[Consistent Overhead Byte Stuffing](https://en.wikipedia.org/wiki/Consistent_Overhead_Byte_Stuffing)
+(COBS) encodes arbitrary bytes so that `0x00` never appears in the output,
+allowing `0x00` to serve as an unambiguous frame delimiter. Overhead is exactly
+1 byte per 254 input bytes (worst case).
+
+## Features
+
+- **`no_std`, zero-alloc** — runs anywhere, from 8-bit MCUs to servers
+- **~140 lines of implementation** — small, auditable, easy to verify
+- **100% spec-compliant** — Cheshire & Baker, IEEE/ACM Transactions on Networking, 1999
+- **Proven interoperability** — cross-validated against `corncobs`, `cobs`, and Python `cobs`
+- **Insanely tested** — canonical vectors, property-based tests, fuzz targets,
+  cross-crate interop, randomized payloads, and more coming
+
+## Usage
+
+```rust
+// Encode
+let mut buf = [0u8; 16];
+let n = ucobs::encode(&[0x11, 0x00, 0x33], &mut buf).unwrap();
+assert_eq!(&buf[..n], &[0x02, 0x11, 0x02, 0x33]);
+
+// Decode
+let mut out = [0u8; 16];
+let n = ucobs::decode(&[0x02, 0x11, 0x02, 0x33], &mut out).unwrap();
+assert_eq!(&out[..n], &[0x11, 0x00, 0x33]);
+
+// Buffer sizing
+let max = ucobs::max_encoded_len(256); // 258
+```
+
+## API
+
+| Function | Signature | Description |
+|---|---|---|
+| `encode` | `(src: &[u8], dest: &mut [u8]) -> Option<usize>` | COBS-encode `src` into `dest`. Returns byte count or `None` if buffer too small. |
+| `decode` | `(src: &[u8], dest: &mut [u8]) -> Option<usize>` | Decode COBS data. Returns byte count or `None` if input is malformed. |
+| `max_encoded_len` | `const fn(src_len: usize) -> usize` | Maximum encoded size for a given input length. |
+
+**Note:** The encoder does *not* append a trailing `0x00` sentinel. Append it
+yourself when framing for transport.
+
+## Testing
+
+```sh
+# Unit + property + interop tests
+cargo test
+
+# Fuzz testing (requires nightly + cargo-fuzz)
+cd fuzz
+cargo +nightly fuzz run fuzz_decode -- -max_total_time=60
+cargo +nightly fuzz run fuzz_roundtrip -- -max_total_time=60
+```
+
+## License
+
+[MIT](LICENSE) — Stephen Waits