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/vegetable_dish/炒滑蛋/炒滑蛋.md

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+# How to Make Scrambled Eggs
+
+![Finished Scrambled Eggs](./炒滑蛋.jpg)
+
+Scrambled eggs are a simple and easy-to-make dish. Beginners can typically complete them in just 5 minutes.
+
+Estimated Cooking Difficulty: ★
+
+## Required Ingredients and Tools
+
+- Eggs (preferably pasteurized)
+- Milk
+
+## Measurements
+
+Per serving:
+
+- 4 eggs
+- 30ml milk
+- 10ml cooking oil
+
+## Instructions
+
+- Whisk the eggs with milk and 5ml of cooking oil, then set aside.
+- Heat a non-stick pan over high heat for about 30 seconds, then add 5ml of cooking oil.
+- After heating for 30 seconds, reduce the heat to low and pour in the egg mixture.
+- Let it sit in the pan for 5 seconds, then gently push the eggs from the edges toward the center using a spatula.
+- Once the eggs are mostly set, remove from heat and serve.
+
+## Additional Tips
+
+- Season with black pepper or salt to taste.
+
+References
+
+- [Sweetheart Kitchen](http://sweetheartkitchen.com/recipes/scrambled-egg/)
+
+If you encounter any issues or have suggestions for improvement while following this guide, please open an Issue or submit a Pull request.