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/drink/奇异果菠菜特调/奇异果菠菜特调.md

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+# How to Make Kiwi Spinach Special Blend
+
+Estimated Cooking Difficulty: ★
+
+## Essential Ingredients and Tools
+
+- Ingredients:
+  - Kiwi
+  - Apple
+  - Spinach leaves (2-5 leaves)
+  - Water
+  - White sugar
+- Tools
+  - Juicer
+
+## Measurements
+
+- Drinking water: 700ml
+- Kiwi: 2 pieces
+- Apple: 1/2 piece
+- Spinach leaves: 4 leaves
+- White sugar: 12 grams
+
+## Instructions
+
+- Cut the kiwi in half, then divide each half into four small pieces
+- Dice the apple
+- Remove the stems from the spinach leaves, keeping only the leafy parts
+- Chop the spinach finely
+- Pour everything into the juicer's blending cup
+- Add water
+- Add white sugar
+- Start the blender and blend for about 4 cycles of 15 seconds each (pause every 15 seconds to check the consistency)
+
+## Additional Notes
+
+- Regarding the amount of white sugar: Full sweetness is 12g, but you can adjust it between 0-12g according to your preference
+- This recipe is inspired by IKEA's Kiwi Spinach Juice. It may not be as delicious as the original, but it's still good
+- Improvements are welcome!
+
+### Final Product
+
+![Kiwi Spinach Special Blend](kiwi-example.jpg)
+
+If you encounter any issues or have suggestions for improvement while following this guide, please submit an Issue or Pull request.