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, 18 deletions

diff --git a/libs/nak/src/lib.rs b/libs/nak/src/lib.rs
deleted file mode 100644
index d6c8e2b..0000000
--- a/libs/nak/src/lib.rs
+++ /dev/null
@@ -1,18 +0,0 @@
-//! NaK - Vendored library for Fluorine Manager
-//!
-//! Stripped version: no GUI, CLI, marketplace, updater, NXM handler,
-//! Steam shortcuts, or managed prefix tracking.
-
-pub mod config;
-pub mod dxvk;
-pub mod slr;
-pub mod game_finder;
-pub mod logging;
-pub mod paths;
-pub mod runtime_wrap;
-pub mod steam;
-pub mod utils;
-
-pub mod deps;
-pub mod icons;
-pub mod installers;