feat!: Split site into public and private sections

Moved the Copper Chronicle and resume into a private git submodule
(src/private), visible only to authenticated users. Added a lock symbol
to the mdbook sidebar for restricted sections. Reorganized nginx/nix
configuration files into a dedicated folder. Removed one-line descriptions
from the menu. Reduced custom CSS to better align the main website's theme
with mdbook's native styling. Personalized the index and blog introduction
pages.

src/recipes/desserts/README.md

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+# Desserts
+
+Sweet treats and after-dinner delights.
+
+- [Ruby Cake](ruby-cake.md)
+- [Pumpkin Pie](pumpkin-pie.md)
+- [Roasted Peaches with Honey, Mint, & Ice Cream](roasted-peaches-with-honey-mint-and-ice-cream.md)
+- [Red Wine Pears](red-wine-pears.md)
+- [Chocolate Fat Bomb Cookies](chocolate-fat-bomb-cookies.md)
+- [Mug Cakes](mug-cakes.md)

src/recipes/desserts/chocolate-fat-bomb-cookies.md

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+*Source: Matt*
+
+## Description
+From Ketoconnect
+
+## Ingredients
+- 1/2 cup erythritol
+- 1/2 cup cocoa powder
+- 1/4 cup butter
+- 2 eggs
+- 1 tsp vanilla
+- 1 cup almond flour
+- 1 tsp baking powder
+- Pinch of salt

src/recipes/desserts/mug-cakes.md

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+*Source: Matt*
+
+## Description
+Originally from Ketoconnect

src/recipes/desserts/pumpkin-pie.md

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+*Source: Abby*
+
+## Ingredients
+- Pie crust
+- Pumpkin puree (fresh or canned)
+- Eggs
+- Heavy cream or evaporated milk
+- Sugar or sweetener
+- Cinnamon
+- Ginger
+- Nutmeg
+- Cloves
+- Salt
+
+**See also:** [Pumpkin Pie from Scratch](https://farmhouseharvest.net/pumpkin-pie-from-scratch/)

src/recipes/desserts/red-wine-pears.md

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+*Source: Abby*
+
+## Ingredients
+- Pears, peeled (stems intact)
+- Red wine
+- Sugar or honey
+- Cinnamon stick
+- Star anise
+- Vanilla bean or extract
+- Orange peel
+
+## Instructions
+1. Combine wine, sweetener, and spices in pot.
+2. Add pears, simmer 20-30 minutes, turning occasionally.
+3. Remove pears, reduce liquid to syrup.
+4. Serve pears with syrup drizzled over.

src/recipes/desserts/roasted-peaches-with-honey-mint-and-ice-cream.md

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+*Source: Abby*
+
+## Ingredients
+- Fresh peaches, halved and pitted
+- Honey
+- Fresh mint leaves
+- Vanilla ice cream
+- Butter
+- Optional: cinnamon
+
+## Instructions
+1. Place peach halves cut-side up in baking dish.
+2. Drizzle with honey, dot with butter.
+3. Roast at 375°F for 20-25 minutes until tender.
+4. Serve warm with ice cream and fresh mint.

src/recipes/desserts/ruby-cake.md

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+*Source: Abby*
+
+## Ingredients
+- Flour
+- Sugar
+- Cocoa powder
+- Eggs
+- Butter or oil
+- Buttermilk
+- Red food coloring
+- Baking soda
+- Vanilla extract
+- Salt