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/葱煎豆腐.md

@@ -0,0 +1,42 @@
+# How to Make Scallion Pan-Fried Tofu
+
+Estimated Cooking Difficulty: ★★★
+
+## Essential Ingredients and Tools
+
+- Firm tofu
+- Scallions
+- Green chili peppers
+- Salt
+- Chicken bouillon powder
+- Skillet
+
+## Calculations
+
+Determine the number of servings before each preparation. One serving is sufficient for 1 person.
+
+Total Quantities:
+
+- Quantity of firm tofu = servings * 0.8 (rounded up).
+- Quantity of chili peppers = 1.5 per 3 servings.
+- Quantity of scallions = 2 stalks per 3 servings.
+- Quantity of salt = servings * 3g.
+- Quantity of chicken bouillon powder = servings * 1.5g.
+
+Use the above conditions to calculate the proportions of raw materials needed, adjusting to taste.
+
+## Instructions
+
+* Wash the tofu thoroughly. Slice it to a thickness of approximately 5 mm and place it on a plate.
+* Wash the scallions, remove the root ends, chop them into scallion bits, and set aside.
+* Wash the chili peppers, slice them open, remove the seeds, and cut them into 1cm x 1cm pieces. Set aside.
+* Heat the skillet and add oil equal to servings * 9ml.
+* Once the oil is in the pan, spread it evenly across the bottom. Arrange the tofu slices evenly and pan-fry over low heat until golden brown, then flip.
+* Once both sides are golden brown, remove the tofu and set aside on a plate.
+* Add enough oil to cover the bottom of the pan. Pour in the chili peppers and stir-fry over high heat, pressing down with the spatula for 3 minutes.
+* Add the tofu back in, stir-fry, and add salt and chicken bouillon powder. Stir-fry over medium heat for 1 minute, then pour in 10 ml of water and reduce the sauce over high heat.
+* Before removing from heat, sprinkle the previously calculated scallion bits on top. Transfer to a serving dish.
+
+## Additional Information
+
+If you encounter any issues or have suggestions for improving the process while following this guide, please submit an Issue or Pull request.