release: bump 0.5.7 -> 0.5.8 (#185)

Version bump for the B4 price oscillators release (#184): `TsfOscillator`, `MacdHistogram`, `PpoHistogram` — 420 → 423 indicators.

Bumps workspace + bindings (Cargo.toml/lock, pyproject, node package.json + 6 platform manifests + lockfiles) and rolls CHANGELOG `[Unreleased]` into `[0.5.8]`.

examples/node/package-lock.json

@@ -17,7 +17,7 @@
     },
     "../../bindings/node": {
       "name": "wickra",
-      "version": "0.5.7",
+      "version": "0.5.8",
       "license": "MIT OR Apache-2.0",
       "devDependencies": {
         "@napi-rs/cli": "^2.18.0"
@@ -26,12 +26,12 @@
         "node": ">= 18"
       },
       "optionalDependencies": {
-        "wickra-darwin-arm64": "0.5.7",
-        "wickra-darwin-x64": "0.5.7",
-        "wickra-linux-arm64-gnu": "0.5.7",
-        "wickra-linux-x64-gnu": "0.5.7",
-        "wickra-win32-arm64-msvc": "0.5.7",
-        "wickra-win32-x64-msvc": "0.5.7"
+        "wickra-darwin-arm64": "0.5.8",
+        "wickra-darwin-x64": "0.5.8",
+        "wickra-linux-arm64-gnu": "0.5.8",
+        "wickra-linux-x64-gnu": "0.5.8",
+        "wickra-win32-arm64-msvc": "0.5.8",
+        "wickra-win32-x64-msvc": "0.5.8"
       }
     },
     "node_modules/wickra": {