Big refactor: get rid of parallel/async/serial features and instead use hierarchy to separate them

.vscode/settings.json

@@ -1,3 +1,3 @@
 {
-    "rust-analyzer.cargo.features": ["serial"]
+    "rust-analyzer.cargo.features": ["serial", "parallel", "async"]
 }

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "easy_fuser"
-version = "0.4.0"
+version = "0.5.0"
 edition = "2021"
 description = "A flexible and idiomatic Fuse implementation for Rust"
 license = "MIT"
@@ -9,33 +9,30 @@ homepage = "https://github.com/Alogani/easy_fuser"
 repository = "https://github.com/Alogani/easy_fuser"
 
 [features]
-default = []
+default = ["parallel"]
 serial = []
 parallel = ["dep:threadpool"]
-async = ["dep:async-trait", "dep:tokio"]
-deadlock_detection = ["parallel", "dep:parking_lot"]
-
+async = [ "dep:tokio", "dep:async-trait"]
 
 [dependencies]
 # Core dependencies
+easy_fuser_macro = { version = "0.1", path = "easy_fuser_macro"}
 log = "0.4"
 libc = "0.2"
 fuser = "0.15"
 bitflags = "2.6.0"
 
 # Parallel dependencies
 threadpool = { version = "1.8", optional = true }
-# Parking lot is only used for deadlock_detection if feature set
-parking_lot = { version = "0.12", features = ["deadlock_detection"], optional = true }
 
 # Async dependencies
 # easy_fuser_async_macro = { path = "./easy_fuser_async_macro", optional = true }
 tokio = { version = "1.42.0", features = ["full"], optional = true }
-async-trait = { version = "0.1.83", optional = true }
+async-trait = { version = "0.1.85", optional = true }
 
 [dev-dependencies]
 tempfile = "3.14"
 env_logger = "0.11"
 
 [package.metadata.docs.rs]
-features = ["parallel"]
+features = ["serial", "parallel"]

easy_fuser_macro/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "easy_fuser_macro"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+syn =  {version = "2.0", features = [ "full" ] }
+quote = "1.0"
+proc-macro2 = "1.0"