chore: prepare v1.1.0 release

Update version numbers across Rust, Python, and documentation files to 1.1.0. Enhance the .gitignore to include macOS dSYM files and plans directory. Introduce new dependencies in the Rust core library and update the README to reflect recent performance benchmarks and backtesting engine capabilities. Add new artifacts to the benchmarks manifest and improve documentation for the backtesting engine API.

.cargo/config.toml

@@ -0,0 +1,17 @@
+# Local development build configuration for ferro-ta.
+#
+# Enables target-cpu=native so the compiler can emit instructions for the
+# host machine (AVX2, NEON, etc.). This primarily benefits release builds
+# where LTO and codegen-units=1 are active (see Cargo.toml [profile.release]).
+#
+# Cargo config.toml does not support per-profile rustflags, so this applies
+# to both debug and release profiles. The impact on debug builds is negligible.
+#
+# WASM targets are excluded so wasm-pack / wasm32-unknown-unknown builds
+# are unaffected.
+#
+# CI may override RUSTFLAGS or use a separate .cargo/config.toml to produce
+# portable binaries for distribution.
+
+[target.'cfg(not(target_arch = "wasm32"))']
+rustflags = ["-C", "target-cpu=native"]