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/鸡蛋火腿炒黄瓜.md

@@ -0,0 +1,44 @@
+# How to Make Cucumber, Ham, and Egg Stir-fry
+
+Estimated Cooking Difficulty: ★★
+
+## Essential Ingredients and Tools
+
+- Cucumber
+- Eggs
+- Ham sausage
+- Salt
+- Light soy sauce
+- Red chili pepper (optional)
+
+## Calculation
+
+Determine how many servings to prepare before each cooking session. One serving is sufficient for 1 person.
+
+Per serving:
+
+- 1 cucumber (approx. 200g)
+- 2 eggs
+- 1 ham sausage (approx. 40g)
+- 1 red chili pepper (optional)
+- 10ml cooking oil
+- 3ml light soy sauce
+- 2g salt
+
+## Instructions
+
+- Wash the cucumber and slice it into half-moon shapes. Set aside.
+- Slice the ham into half-moon shapes. Set aside.
+- (Optional) Finely chop the red chili pepper. Set aside.
+- Crack the eggs into a bowl and whisk until well mixed. This is the `egg mixture`.
+- Heat a pan and add 5ml of cooking oil.
+- Once the oil is hot, reduce the heat to low, pour in the `egg mixture`, and scramble it with chopsticks. Stir-fry until the eggs are set and slightly yellowed. This is the `semi-cooked egg`. Remove from the pan and set aside.
+- **Do not wash the pan**. Add 5ml of cooking oil to the pan, then add the cucumber slices. Stir-fry over high heat for **1 minute**.
+- Add the `semi-cooked eggs` back to the pan. Season with 2g of salt and 3ml of light soy sauce. Immediately add the ham slices and chopped chili pepper (optional). Stir-fry until evenly mixed.
+- Turn off the heat and plate the dish.
+
+## Additional Notes
+
+- Ham is salty, so add it after seasoning to prevent it from absorbing extra salt.
+
+If you encounter any issues or have suggestions for improving the process after following this guide, please submit an Issue or Pull request.