[texture] Present Canary GPUTEXTUREFORMAT names + metadata; handle XPR5

- Port xenia-canary's complete 64-entry texture-format table (xenos.h enum +
  texture_info_formats.inl) into GPU_FORMATS + gpu_format_name()/desc() and
  X360TextureFormat::gpu_name()/desc().
- Viewer + CLI `texture info` now show the canonical k_… name, bpp and
  compressed flag (e.g. "k_DXT1 (Dxt1) · 4 bpp, compressed"); UnsupportedFormat
  now names the format instead of a bare hex code.
- Detect non-XPR2 containers up front: the game ships one XPR5 file
  (Common.xpr) alongside 165 XPR2 — report UnsupportedContainer("XPR5")
  cleanly instead of a "bad magic" parse error.
- Add a table-integrity test (index==code, spot-checks, decodable-variant
  consistency).

Static-RE scan of the 166 resource3d XPRs: only k_DXT1 (145), k_8_8_8_8 (19),
k_DXT5A (1) are used — all already decoded, so this is presentation, not new
decoders.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

crates/sylpheed-cli/src/main.rs

@@ -359,9 +359,16 @@ fn cmd_texture_info(file: &Path) -> Result<()> {
     let tex = X360Texture::from_xpr2(&bytes)
         .with_context(|| format!("Failed to parse texture: {}", file.display()))?;
 
+    let d = tex.format.desc();
     println!("{} {}", "Texture:".green().bold(), file.display());
     println!("  Resolution : {}×{}", tex.width.to_string().yellow(), tex.height.to_string().yellow());
-    println!("  Format     : {:?}", tex.format);
+    println!(
+        "  Format     : {} ({:?})  ·  {} bpp, {}",
+        tex.format.gpu_name().yellow(),
+        tex.format,
+        d.bpp,
+        if d.compressed { "compressed" } else { "uncompressed" },
+    );
     println!("  Mip levels : {}", tex.mip_levels);
     println!("  Data size  : {} bytes", tex.data.len().to_string().yellow());