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/松仁玉米.md

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+# How to Make Pine Nut Corn
+
+Pine Nut Corn is a colorful, aromatic, and delicious home-cooked dish. It is sweet, tender, and refreshing, with crispy pine nuts, making it suitable for all ages.
+
+Estimated Cooking Difficulty: ★★
+
+## Essential Ingredients and Tools
+
+* Corn kernels (sweet corn is recommended)
+* Roasted pine nut kernels
+* Carrots (optional, for added color)
+* Cooking oil
+* White sugar
+* Salt
+* Cornstarch
+* Water
+
+## Measurements
+
+Per serving:
+
+* Corn kernels 200 g (canned sweet corn can be used, or cook fresh corn beforehand)
+* Roasted pine nut kernels 30 g
+* Carrots 50 g (cut into small cubes; optional)
+* Cooking oil 15 ml
+* White sugar 10 g
+* Salt 1 g
+* Cornstarch 5 g
+* Water 20 ml (for mixing with cornstarch)
+
+## Instructions
+
+* Blanch the corn kernels and carrot cubes for 1 minute, then drain and set aside
+* Heat a pan with cool oil, add the carrot cubes and stir-fry briefly, then add the corn kernels and stir-fry
+* Add white sugar and salt, and stir to combine
+* Mix water and cornstarch to make a slurry, pour it into the pan, and stir-fry quickly until the sauce thickens slightly
+* Add the roasted pine nut kernels and stir-fry evenly
+* Remove from heat and plate
+
+## Additional Tips
+
+* You can dry-roast the pine nut kernels over low heat until slightly golden and crispy beforehand for better flavor
+* If using canned corn, drain the liquid well first to prevent excess moisture during stir-frying
+* Avoid high heat during stir-frying to prevent burning the pan or scorching the pine nuts
+
+If you encounter any issues or have suggestions for improvement while following this guide, please submit an Issue or Pull request.