feat: add infer and tree_magic_mini meta plugins, make zstd internal by default

- Add infer crate as meta plugin for MIME type detection
- Add tree_magic_mini crate as alternative meta plugin for MIME type detection
- Add zstd, infer, tree_magic_mini to default features
- Fix static build script to use musl target instead of glibc+crt-static
- Remove hardcoded shell list from --generate-completion help text
- Fix update() in both new plugins to emit MIME metadata when buffer fills

src/args.rs

@@ -82,7 +82,7 @@ pub struct ModeArgs {
     pub generate_config: bool,
 
     #[arg(help_heading("Mode Options"), long, conflicts_with_all(["save", "get", "diff", "list", "delete", "info", "update", "status", "server", "generate_config", "export", "import"]))]
-    #[arg(help("Generate shell completion script (bash, zsh, fish, elvish, powershell)"))]
+    #[arg(help("Generate shell completion script"))]
     pub generate_completion: Option<Shell>,
 
     #[arg(help_heading("Server Options"), long, env("KEEP_SERVER_ADDRESS"))]