feat(python): implement python bindings for all components and solvers

crates/components/Cargo.toml

@@ -9,8 +9,8 @@ repository = "https://github.com/entropyk/entropyk"
 
 [features]
 default = []
-ffi = []
-http = []
+ffi = ["dep:libloading"]
+http = ["dep:reqwest"]
 
 [dependencies]
 # Core types from Story 1.2
@@ -25,6 +25,10 @@ thiserror = "1.0"
 # Serialization
 serde = { version = "1.0", features = ["derive"] }
 
+# External model dependencies
+libloading = { version = "0.8", optional = true }
+reqwest = { version = "0.12", features = ["blocking", "json"], optional = true }
+
 [dev-dependencies]
 # Floating-point assertions
 approx = "0.5"