Add English translations for all 379 recipe and tip files

Use dotlang AI translation (aiursoft-instruct:latest via Ollama) to
translate all Chinese content to English under en/ subfolder:
- en/dishes/: all recipe categories (aquatic, breakfast, condiment,
  dessert, drink, meat_dish, semi-finished, soup, staple, vegetable_dish)
- en/tips/: learn/ and advanced/ cooking guides
- en/README.md, en/CONTRIBUTING.md, en/CODE_OF_CONDUCT.md

The mkdocs-static-i18n plugin (docs_structure: folder) serves Chinese
at the root and English at /en/, with a language switcher in the UI.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

en/dishes/drink/长岛冰茶.md

@@ -0,0 +1,58 @@
+
+# How to Make a Long Island Iced Tea
+
+**Alcohol consumption is harmful to health. Minors are prohibited from drinking.**
+
+Estimated cooking difficulty: ★★
+
+## Essential Ingredients and Tools
+
+- Gin
+- Tequila
+- Vodka
+- White Rum
+- Orange liqueur
+- Lemon
+- Maple syrup
+- Cola
+- Ice cubes
+- Highball glass (300ml capacity)
+
+## Measurements
+
+For one serving, approximately 300ml (including ice):
+
+- Gin: 15ml
+- Tequila: 15ml
+- Vodka: 15ml
+- White Rum: 15ml
+- Orange liqueur: 15ml
+- Lemon juice: 30ml
+- Maple syrup: 20ml
+- Cola: 75ml
+- Lemon: 1
+- Ice cubes: 100g
+
+## Instructions
+
+- Cut the lemon in half and squeeze 30ml of lemon juice into the glass;
+- Add the following ingredients to the glass in order:
+  - 15ml Gin,
+  - 15ml Tequila,
+  - 15ml Vodka,
+  - 15ml White Rum,
+  - 15ml Orange liqueur;
+
+- Slowly pour 20ml of maple syrup into the glass while stirring;
+- Add 75ml of Cola to the glass;
+- Add ice cubes until the glass is full;
+- Gently stir for 20 seconds;
+- Enjoy.
+
+## Additional Information
+
+The Long Island Iced Tea contains no tea but has the taste of iced tea. It is a cocktail with a relatively high alcohol content (approximately 15%) but a smooth and approachable flavor.
+
+Reference: [International Bartenders Association: Long Island Iced Tea](https://iba-world.com/long-island-ice-tea/)
+
+If you encounter any issues or have suggestions for improvement while following this guide, please submit an Issue or Pull request.