Remove NaK/Rust dependency, port remaining functionality to native C++

Replace NaK Rust crate and nak_ffi with native C++ implementations:
- Game detection (Steam, Heroic, Bottles), VDF parser, icon extraction
- Prefix symlinks, SLR manager, Steam path detection
- Known games database

Add FUSE VFS optimizations: zero-copy reads via fuse_reply_data,
default_permissions mount option, FUSE_CAP_ASYNC_DIO, FUSE_CAP_EXPIRE_ONLY,
lookup cache parent index, cached mode bits, increased I/O buffer sizes.

Update build system, prefix setup, and various fixes.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

1 files changed, 0 insertions, 58 deletions

diff --git a/libs/nak/src/runtime_wrap.rs b/libs/nak/src/runtime_wrap.rs
deleted file mode 100644
index 943a329..0000000
--- a/libs/nak/src/runtime_wrap.rs
+++ /dev/null
@@ -1,58 +0,0 @@
-use std::ffi::OsStr;
-use std::process::Command;
-
-/// Build a command to run `exe` with the given environment variables.
-///
-/// If SLR (Steam Linux Runtime) is installed, the command is wrapped inside
-/// the pressure-vessel container via the SLR `run` script.  Environment
-/// variables are set on the process and inherited by pressure-vessel into the
-/// container (matching how game launches work via QProcess).  This ensures
-/// Wine/Proton commands use the container's libraries instead of potentially
-/// broken host libraries.
-pub fn build_command<S: AsRef<OsStr>>(
-    exe: impl AsRef<OsStr>,
-    envs: &[(&str, S)],
-) -> Command {
-    if let Some(slr_script) = crate::slr::get_slr_run_script() {
-        let mut cmd = Command::new(&slr_script);
-        // Set env vars on the process — pressure-vessel inherits them
-        for (key, value) in envs {
-            cmd.env(key, value.as_ref());
-        }
-        // Expose the executable's parent directory to the container —
-        // needed for system-installed Protons (e.g. /usr/share/steam/...)
-        // whose files may not be visible inside the container by default.
-        if let Some(parent) = std::path::Path::new(exe.as_ref()).parent() {
-            if parent.exists() {
-                let mut flag = std::ffi::OsString::from("--filesystem=");
-                flag.push(parent.as_os_str());
-                cmd.arg(flag);
-            }
-        }
-        // Also expose WINEPREFIX if set in env vars
-        for (key, value) in envs {
-            if *key == "WINEPREFIX" || *key == "STEAM_COMPAT_DATA_PATH" {
-                let path = std::path::Path::new(value.as_ref());
-                if path.exists() || path.parent().map_or(false, |p| p.exists()) {
-                    let mut flag = std::ffi::OsString::from("--filesystem=");
-                    flag.push(value.as_ref());
-                    cmd.arg(flag);
-                }
-            }
-        }
-        cmd.arg("--");
-        cmd.arg(exe);
-        cmd
-    } else {
-        let mut cmd = Command::new(exe);
-        for (key, value) in envs {
-            cmd.env(key, value.as_ref());
-        }
-        cmd
-    }
-}
-
-/// Build a command with no extra environment variables.
-pub fn command_for(exe: impl AsRef<OsStr>) -> Command {
-    build_command::<&str>(exe, &[])
-}