chore: monorepo inicial con arje + minga + yahweh absorbidos

Workspace en 4 ejes (core/modules/apps/shared):

- core/: 24 crates de arje (Init systemd-compatible: ente-card, ente-zero,
  ente-kernel, ente-bus, ente-cas, ente-soma, ente-wasm, ente-snapshot,
  ente-brain, ente-echo, ente-policy-provider, + 12 crates *-compat)
- modules/semantic_dht/: 5 crates de minga (minga-core con AST/CAS/MST,
  minga-p2p con libp2p Kad, minga-store, minga-vfs, minga-cli)
- modules/ui_engine/: 11 crates de yahweh (libs/{core,theme,bus,providers},
  widgets/{tree,splitter,tabs,tiled,container_core,text_input})
- apps/: 5 crates de yahweh (file_explorer, database_explorer, text_viewer,
  image_viewer, yahweh-shell)
- shared_wit/protocol.wit: handshake/lifecycle inicial

Cargo.toml unificado: thiserror bumped a 2 (transparente para arje), tokio
"full", paths intra-workspace de yahweh redirigidos a su nueva ubicación.

cargo check --workspace: 0 errores, 17 warnings (dead code preexistente).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

crates/core/ente-binfmt-compat/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "ente-binfmt-compat"
+version = "0.0.1"
+edition.workspace = true
+license.workspace = true
+publish.workspace = true
+
+[[bin]]
+name = "ente-binfmt-compat"
+path = "src/main.rs"
+
+[dependencies]
+anyhow = { workspace = true }
+tracing = { workspace = true }
+tracing-subscriber = { workspace = true }

crates/core/ente-binfmt-compat/src/main.rs

@@ -0,0 +1,109 @@
+//! ente-binfmt-compat: registra handlers de binfmt_misc al boot.
+//!
+//! systemd-binfmt lee `/usr/lib/binfmt.d/*.conf` y `/etc/binfmt.d/*.conf` y
+//! escribe cada línea al kernel via `/proc/sys/fs/binfmt_misc/register`.
+//! Esto habilita ejecución transparente de binarios no-ELF (qemu-user,
+//! wine, etc).
+//!
+//! Formato de cada línea:
+//!   :<name>:<type>:<offset>:<magic>:<mask>:<interpreter>:<flags>
+//!
+//! Líneas que empiezan con `#` o vacías se ignoran.
+
+use std::fs;
+use std::io::Write;
+use std::path::Path;
+use tracing::{info, warn};
+use tracing_subscriber::EnvFilter;
+
+const REGISTER_PATH: &str = "/proc/sys/fs/binfmt_misc/register";
+const SEARCH_DIRS: &[&str] = &[
+    "/usr/lib/binfmt.d",
+    "/etc/binfmt.d",
+    "/run/binfmt.d",
+];
+
+fn main() {
+    init_tracing();
+    info!("ente-binfmt-compat: registrando handlers binfmt_misc");
+
+    if !Path::new(REGISTER_PATH).exists() {
+        warn!(path = REGISTER_PATH, "binfmt_misc no montado — skip");
+        std::process::exit(0);
+    }
+
+    let mut registered = 0;
+    let mut errors = 0;
+    let mut skipped = 0;
+
+    for dir in SEARCH_DIRS {
+        if !Path::new(dir).exists() { continue; }
+        let mut entries: Vec<_> = match fs::read_dir(dir) {
+            Ok(rd) => rd.filter_map(|e| e.ok()).collect(),
+            Err(_) => continue,
+        };
+        entries.sort_by_key(|e| e.file_name());
+        for entry in entries {
+            let path = entry.path();
+            if path.extension().map(|e| e != "conf").unwrap_or(true) { continue; }
+            let content = match fs::read_to_string(&path) {
+                Ok(c) => c,
+                Err(e) => { warn!(?e, path = %path.display(), "read"); continue; }
+            };
+            for line in content.lines() {
+                let line = line.trim();
+                if line.is_empty() || line.starts_with('#') { continue; }
+                match register(line) {
+                    Ok(name) => {
+                        info!(file = %path.display(), %name, "binfmt registrado");
+                        registered += 1;
+                    }
+                    Err(e) => {
+                        if e.is_already_exists() {
+                            skipped += 1;
+                        } else {
+                            warn!(?e, file = %path.display(), "registro falló");
+                            errors += 1;
+                        }
+                    }
+                }
+            }
+        }
+    }
+    info!(registered, skipped, errors, "binfmt aplicado");
+    if errors > 0 { std::process::exit(1); }
+}
+
+#[derive(Debug)]
+struct RegError(std::io::Error);
+impl std::fmt::Display for RegError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { write!(f, "{}", self.0) }
+}
+impl RegError {
+    fn is_already_exists(&self) -> bool {
+        // EEXIST = 17 en Linux.
+        self.0.raw_os_error() == Some(17)
+    }
+}
+
+/// Escribe la línea al register file. Devuelve el `name` extraído del
+/// primer campo (entre `:` separators) si tuvo éxito.
+fn register(line: &str) -> Result<String, RegError> {
+    // Sintaxis: :<name>:<type>:<offset>:<magic>:<mask>:<interpreter>:<flags>
+    // Field 0 (después del ':' inicial) es el name.
+    let name = line.split(':').nth(1)
+        .map(|s| s.to_string())
+        .unwrap_or_else(|| "?".into());
+    let mut f = fs::OpenOptions::new()
+        .write(true)
+        .open(REGISTER_PATH)
+        .map_err(RegError)?;
+    f.write_all(line.as_bytes()).map_err(RegError)?;
+    Ok(name)
+}
+
+fn init_tracing() {
+    let filter = EnvFilter::try_from_default_env()
+        .unwrap_or_else(|_| EnvFilter::new("ente_binfmt_compat=info"));
+    tracing_subscriber::fmt().with_env_filter(filter).with_target(true).init();
+}