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/鸡蛋三明治.md

@@ -0,0 +1,40 @@
+# How to Make an Egg Sandwich
+
+Easy 10-Minute Egg Sandwich 🥪
+
+Estimated Cooking Difficulty: ★★
+
+## Ingredients and Tools Needed
+
+- Eggs
+- Bread slices
+- Bacon
+- Butter
+- Mayonnaise
+- Salt
+- Black pepper
+
+## Measurements
+
+- 1 egg
+- 2 slices of bread
+- 2 slices of bacon
+- 10 g butter
+- 20 g mayonnaise
+- 1 g salt
+- 2 g black pepper
+
+## Instructions
+
+- Trim the crusts off the bread slices and set aside.
+- Hard-boil the eggs and mash them.
+- Mix the mashed eggs with mayonnaise, salt, and black pepper.
+- Melt the butter in a pan and cook the bacon until crisp.
+- Assemble the sandwich by spreading the egg mixture and placing the bacon between the two bread slices.
+- Cut the crustless square sandwiches diagonally into triangles and serve.
+
+## Additional Notes
+
+- You can also add ingredients like cheese or pickles.
+
+If you encounter any issues or have suggestions for improving the process while following this guide, please open an Issue or submit a Pull request.