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/莴笋叶煎饼/莴笋叶煎饼.md

@@ -0,0 +1,42 @@
+# How to Make Lettuce Leaf Pancakes
+
+Lettuce leaf pancakes are nutritious and delicious.
+
+Estimated cooking difficulty: ★★
+
+## Essential Ingredients and Tools
+
+* Lettuce leaves
+* Eggs
+* Cooking oil
+* Light soy sauce
+* Starch
+* Chicken bouillon powder
+
+## Measurements
+
+Per serving:
+
+* Lettuce leaves: 50 g
+* Eggs: 2
+* Cooking oil: 30 ml
+* Light soy sauce: 5 ml
+* Starch: 15 g
+* Chicken bouillon powder: 2 g
+
+## Instructions
+
+* Finely chop the lettuce leaves, add eggs, starch, light soy sauce, and chicken bouillon powder, then mix well and set aside.
+* Heat oil in a pan, pour in the lettuce leaf batter, and spread it evenly across the pan's surface.
+* Fry the first side for 120 seconds, flip, and fry the other side for 60 seconds before removing from the pan.
+
+![Example dish result](./1.jpeg)
+![Example dish result](./2.jpeg)
+![Example dish result](./3.jpeg)
+
+## Additional Notes
+
+* Lettuce leaves are commonly included in vegetable packs purchased in many cities and provinces; you can substitute with chives or other greens if necessary.
+* Directly blanching lettuce leaves for a cold salad results in a bitter taste, so making them into pancake fillings is a better option.
+
+If you encounter any issues or have suggestions for improvement while following this guide, please submit an Issue or Pull request.