[DOCS-REFAC] Create Models Patterns and Integration Documentation File (#187)

Author: pheobeayo

client/pages/getting-started/basics/models.md

@@ -397,161 +397,3 @@ mod tests {
 }
 ```
 
-### Testing Traits and Methods
-
-```cairo
-#[test]
-fn test_is_rare() {
-    let mut potion = PotionTrait::new_potion(1);
-    
-    potion.rarity = Rarity::VeryRare;
-    assert_eq!(potion.is_rare(), true, "VeryRare should return true");
-    
-    potion.rarity = Rarity::Rare;
-    assert_eq!(potion.is_rare(), true, "Rare should return true");
-    
-    potion.rarity = Rarity::Uncommon;
-    assert_eq!(potion.is_rare(), false, "Uncommon should return false");
-}
-```
-
-## Special Model Patterns
-
-### Game Settings with Constant Keys
-
-For global values or settings:
-
-```cairo
-const GAME_SETTINGS_ID: u32 = 9999999999999;
-
-#[derive(Copy, Drop, Serde)]
-#[dojo::model]
-struct GameSettings {
-    #[key]
-    game_settings_id: u32,
-    combat_cool_down: u32,
-}
-
-// Usage:
-world.read_model(GAME_SETTINGS_ID);
-```
-
-### Type-Safe Entity IDs
-
-To avoid ID collisions:
-
-```cairo
-const HUMAN: felt252 = 'HUMAN';
-const GOBLIN: felt252 = 'GOBLIN';
-
-// Create unique IDs:
-let human_id = poseidon_hash_span([id, HUMAN].span());
-let goblin_id = poseidon_hash_span([goblin_count, GOBLIN].span());
-```
-
-## Upgrading Models and Data Migration
-
-Upgrading models is safe as long as changes don't affect the existing data layout and schema.
-
-### Safe Upgrades
-
-Adding a new field without modifying existing ones:
-
-```cairo
-// Original model
-#[dojo::model]
-struct Player {
-    #[key]
-    player_id: u64,
-    username: String,
-    score: u32,
-}
-
-// Upgraded model (safe)
-#[dojo::model]
-struct Player {
-    #[key]
-    player_id: u64,
-    username: String,
-    score: u32,
-    level: u8, // New field
-}
-```
-
-### Incompatible Upgrades
-
-Changes that alter the existing layout will fail:
-- Removing or reordering fields
-- Changing field types
-- Changing key structure
-
-## Best Practices for Model Design
-
-### Keep Models Small and Focused
-
-Follow ECS principles by keeping models small and focused on a single aspect of an entity:
-
-```cairo
-// Good: Separate models for different aspects
-#[dojo::model]
-struct Health {
-    #[key]
-    id: u32,
-    health: u8,
-}
-
-#[dojo::model]
-struct Position {
-    #[key]
-    id: u32,
-    x: u32,
-    y: u32
-}
-
-// Avoid: Large monolithic models
-#[dojo::model]
-struct Character {
-    #[key]
-    id: u32,
-    health: u8,
-    max_health: u8,
-    mana: u8,
-    max_mana: u8,
-    x: u32,
-    y: u32,
-    inventory_slots: u8,
-    // ... many more fields
-}
-```
-
-### Use Appropriate Types
-
-Choose types based on data needs:
-- `u8` for small integers (0-255)
-- `u16`, `u32`, etc. for larger integers
-- `felt252` for names and identifiers
-- Custom structs and enums for complex data
-
-### Implement Validation Logic
-
-Use traits and assertions to validate model state:
-
-```cairo
-fn assert_valid_health(self: @Health) {
-    assert(self.health > 0, 'Health must be positive');
-    assert(self.health <= self.max_health, 'Health cannot exceed max');
-}
-```
-
-### Plan for Upgrades
-
-Design models with future upgrades in mind:
-- Consider which fields might need to change
-- Use `IntrospectPacked` only when necessary
-- Document expected upgrade paths
-
-## Conclusion
-
-Models are the core of game state management in Dojo Engine, defining how data is structured and stored on Starknet. By combining models with **entities** and **systems** in the **ECS** pattern, you can build dynamic, decentralized games. 
-
-Use the examples and patterns in this guide as a starting point for your own model designs, and experiment with the different approaches to find what works best for your game's needs.