[antlir2] import sendstream_parser crate

Summary:
I wrote this upstream, now I need to actually use it in antlir2.

I'm re-homing this crate here and will publish future revisions from the
antlir2 github repository and will archive my own copy.

Test Plan:
```
❯ buck2 test fbcode//antlir/antlir2/sendstream_parser/...
Buck UI: https://www.internalfb.com/buck2/bcf62163-969c-4806-9d97-511de66fd1ab
Test UI: https://www.internalfb.com/intern/testinfra/testrun/14636698802964271
Note:    Using experimental modern dice
Network: Up: 2.9KiB  Down: 5.7KiB  (reSessionID-52f3c095-f2e3-41fe-a37e-2ad379a55a43)
Jobs completed: 767. Time elapsed: 8.8s.
Cache hits: 0%. Commands: 2 (cached: 0, remote: 0, local: 2)
Tests finished: Pass 3. Fail 0. Fatal 0. Skip 0. Build failure 0
```

Differential Revision: D52049042

fbshipit-source-id: aa414ab61cfd4ab8a036669cc1c8e709e2953409

antlir/antlir2/sendstream_parser/BUCK

@@ -0,0 +1,28 @@
+load("//antlir/bzl:build_defs.bzl", "rust_library")
+
+oncall("antlir")
+
+rust_library(
+    name = "sendstream_parser",
+    srcs = glob(["src/**/*.rs"]),
+    autocargo = {
+        "cargo_target_config": {
+            "test": True,
+        },
+    },
+    features = ["serde"],
+    test_deps = [
+        "similar-asserts",
+    ],
+    test_features = ["serde"],
+    test_srcs = glob(["testdata/*"]),
+    deps = [
+        "derive_more",
+        "hex",
+        "nix",
+        "nom",
+        "serde",
+        "thiserror",
+        "uuid",
+    ],
+)

antlir/antlir2/sendstream_parser/Cargo.toml

@@ -0,0 +1,32 @@
+# @generated by autocargo from //antlir/antlir2/sendstream_parser:[sendstream_parser,sendstream_parser-unittest]
+
+[package]
+name = "sendstream_parser"
+version = "0.0.0"
+edition = "2021"
+repository = "https://github.com/facebookincubator/antlir"
+license = "MIT"
+
+[lib]
+doctest = false
+
+[[test]]
+name = "sendstream_parser"
+path = "src/lib.rs"
+
+[dependencies]
+derive_more = "0.99.17"
+hex = "0.4.3"
+nix = "0.25"
+nom = "7.1"
+serde = { version = "1.0.185", features = ["derive", "rc"], optional = true }
+thiserror = "1.0.49"
+uuid = { version = "1.2", features = ["serde", "v4", "v5", "v6", "v7", "v8"] }
+
+[dev-dependencies]
+serde = { version = "1.0.185", features = ["derive", "rc"] }
+similar-asserts = "1.4.2"
+
+[features]
+default = ["serde", "serde"]
+serde = []

antlir/antlir2/sendstream_parser/README.md

@@ -0,0 +1,12 @@
+[![Workflow Status](https://github.com/vmagro/sendstream_utils/actions/workflows/main.yml/badge.svg)](https://github.com/vmagro/sendstream_utils/actions)
+[![docs.rs](https://img.shields.io/docsrs/sendstream_parser)](https://docs.rs/sendstream_parser)
+![Maintenance](https://img.shields.io/badge/maintenance-experimental-blue.svg)
+
+# sendstream_parser
+
+Rust parser for [BTRFS
+Sendstreams](https://btrfs.readthedocs.io/en/latest/Send-receive.html)
+which are created via
+[btrfs-send](https://btrfs.readthedocs.io/en/latest/btrfs-send.html).
+
+License: MIT