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/breakfast/燕麦鸡蛋饼.md

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+# How to Make Oatmeal Egg Pancakes
+
+Oatmeal egg pancakes are a highly nutritious, easy-to-make, and quick breakfast option. They are especially suitable for fitness enthusiasts who are office workers.
+
+Estimated Cooking Difficulty: ★★
+
+## Essential Ingredients and Tools
+
+- Eggs
+- Oats
+- Milk: 50-100g, enough to mix the oats until thick and sticky.
+- Optional: Add 50g of vegetables, such as spinach, according to your taste.
+
+## Quantities
+
+- 2 eggs (or choose 2 egg whites and 1 egg yolk).
+- 50g of plain rolled oats (approximately equivalent to the volume of one egg).
+- 1 carton of milk, approximately 250ml.
+- A handful of chopped leafy vegetables.
+
+## Instructions
+
+- Mix the milk with the dry oats and stir until thick and sticky.
+- Beat the eggs until the color is uniform.
+- Pour the beaten eggs into the oatmeal-milk mixture and continue stirring until thick and uniform.
+- Add a layer of butter to a non-stick pan and spread it evenly.
+- Pour in the mixed ingredients and spread them out into a pancake shape.
+- Cook over low heat for 2-3 minutes. If you want to add vegetables, you can add the chopped greens during this time.
+- Flip the pancake and cook for another 2 minutes.
+- Remove from the pan and serve with the remaining milk as your breakfast.
+
+## Additional Tips
+
+- If you prefer a savory taste, add seasonings like salt and pepper while beating the eggs.
+- Use low heat when frying the pancakes to prevent the oats from burning.
+
+### Nutritional Information
+
+The estimated nutritional value (macronutrients) for one serving of this breakfast is as follows, for the reference of fitness enthusiasts*.
+
+- Carbohydrates: 39g
+- Protein: 30g
+- Fat: 19g
+- Total Calories: 450kcal
+
+*: Calculated based on a standard 250ml serving of milk.
+
+If you encounter any issues or have suggestions for improving the process after following this guide, please submit an Issue or Pull request.