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, 10 deletions

diff --git a/libs/nak_ffi/Cargo.toml b/libs/nak_ffi/Cargo.toml
deleted file mode 100644
index cdf98df..0000000
--- a/libs/nak_ffi/Cargo.toml
+++ /dev/null
@@ -1,10 +0,0 @@
-[package]

-name = "nak_ffi"

-version = "0.1.0"

-edition = "2021"

-

-[lib]

-crate-type = ["cdylib"]

-

-[dependencies]

-nak_rust = { path = "../nak" }