Initial commit: xenia-rs workspace for Xbox 360 RE

Rust reimplementation of the xenia Xbox 360 emulator targeting reverse-
engineering and preservation, initially scoped to Project Sylpheed.

Includes:
- XEX2 loader (LZX decompression, AES decryption, PE parsing)
- XISO / XGD2 disc image VFS
- PPC interpreter with 200+ opcodes and VMX128 decoding
- Static analyzer: functions, cross-references, labels, asm + SQLite output
- HLE kernel covering the xboxkrnl/xam subset used by Sylpheed init
- Debugger with in-memory and SQLite-backed execution tracing
- `xenia-rs` CLI with extract/dis/exec commands that produce cumulative,
  superset SQLite databases and opt-in instruction/import/branch traces

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Cargo.toml

@@ -0,0 +1,47 @@
+[workspace]
+resolver = "2"
+members = [
+    "crates/xenia-types",
+    "crates/xenia-memory",
+    "crates/xenia-cpu",
+    "crates/xenia-xex",
+    "crates/xenia-vfs",
+    "crates/xenia-kernel",
+    "crates/xenia-gpu",
+    "crates/xenia-apu",
+    "crates/xenia-hid",
+    "crates/xenia-debugger",
+    "crates/xenia-analysis",
+    "crates/xenia-app",
+]
+
+[workspace.package]
+version = "0.1.0"
+edition = "2024"
+license = "BSD-3-Clause"
+
+[workspace.dependencies]
+# Shared types
+xenia-types = { path = "crates/xenia-types" }
+xenia-memory = { path = "crates/xenia-memory" }
+xenia-cpu = { path = "crates/xenia-cpu" }
+xenia-xex = { path = "crates/xenia-xex" }
+xenia-vfs = { path = "crates/xenia-vfs" }
+xenia-kernel = { path = "crates/xenia-kernel" }
+xenia-gpu = { path = "crates/xenia-gpu" }
+xenia-apu = { path = "crates/xenia-apu" }
+xenia-hid = { path = "crates/xenia-hid" }
+xenia-debugger = { path = "crates/xenia-debugger" }
+xenia-analysis = { path = "crates/xenia-analysis" }
+
+# External dependencies
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+bitflags = "2"
+byteorder = "1"
+thiserror = "2"
+anyhow = "1"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+aes = "0.8"
+rusqlite = { version = "0.31", features = ["bundled"] }