Update macOS to v26 (#1811)

- renovate macOS 26 enabled #1810
- supersede macOS 15 Xcode 16.4 significantly slower RCT-Folly (and Reanimated) C++ compilation
- bypass macOS 14 Xcode 16.2
- bypass macOS 15 Xcode 26.0.1/26.1 RC
- update documentation

Close: #1809
Resolve: #1812

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: leotm

.github/workflows/ios.yml

@@ -9,7 +9,7 @@ on:
 jobs:
   build-ios:
 
-    runs-on: macos-14 # https://github.com/actions/runner-images/blob/main/images/macos/macos-14-arm64-Readme.md
+    runs-on: macos-26 # https://github.com/actions/runner-images/blob/main/images/macos/macos-26-arm64-Readme.md
 
     steps: