Create installation-for-react-native-below-67.md

Author: WadhahEssam

installation-for-react-native-below-67.md

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+## For React Native Versions 0.67 and Below
+### iOS:
+ **Update your `Podfile`** with the following line:
+   ```
+   pod 'react-native-theme-switch-animation', :path => '../node_modules/react-native-theme-switch-animation'
+   ```
+   
+### Android:
+
+Modify your `android/app/build.gradle` file to include:
+```
+implementation project(':react-native-theme-switch-animation')
+```
+
+Update your `settings.gradle` file with:
+```
+include ':react-native-theme-switch-animation'
+project(':react-native-theme-switch-animation').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-theme-switch-animation/android')
+```
+
+Update `MainActivity.java`:
+```
+import com.themeswitchanimation.ThemeSwitchAnimationPackage;
+```
+
+```
+packages.add(new ThemeSwitchAnimationPackage());
+```