Add .gitignore for create-expo compatibility

- Added a `.gitignore` file for use during template development.
- The previously added `gitignore` file becomes the active `.gitignore` post-template usage.
- This dual-file strategy accounts for `create-expo`'s handling of `.gitignore` files:
  - Provides a default `.gitignore` if none exists.
  - Overrides an existing `.gitignore` with a default version.
  - Utilizes a `gitignore` file, if present, instead of creating a new one.
- The setup ensures our custom rules are maintained when the template is employed.

Author: aryaemami59

packages/expo-template-redux-typescript/.gitignore

@@ -0,0 +1,41 @@
+# Learn more https://docs.github.com/en/get-started/getting-started-with-git/ignoring-files
+
+# dependencies
+node_modules/
+.yarn/
+package-lock.json
+yarn.lock
+
+# Expo
+.expo/
+dist/
+web-build/
+
+# Native
+*.orig.*
+*.jks
+*.p8
+*.p12
+*.key
+*.mobileprovision
+
+# Metro
+.metro-health-check*
+
+# debug
+npm-debug.*
+yarn-debug.*
+yarn-error.*
+
+# macOS
+.DS_Store
+*.pem
+
+# local env files
+.env*.local
+
+# typescript
+*.tsbuildinfo
+
+# IDE
+.vscode