Add feature flags for CLI binaries; configure required features for each binary

crates/owlen-cli/Cargo.toml

@@ -4,13 +4,20 @@ version = "0.1.0"
 edition = "2021"
 description = "Command-line interface for OWLEN LLM client"
 
+[features]
+default = ["chat-client"]
+chat-client = []
+code-client = []
+
 [[bin]]
 name = "owlen"
 path = "src/main.rs"
+required-features = ["chat-client"]
 
 [[bin]]
 name = "owlen-code"
 path = "src/code_main.rs"
+required-features = ["code-client"]
 
 [dependencies]
 owlen-core = { path = "../owlen-core" }
@@ -31,4 +38,4 @@ crossterm = { workspace = true }
 # Utilities
 anyhow = { workspace = true }
 serde = { workspace = true }
-serde_json = { workspace = true }
+serde_json = { workspace = true }