Add Language Management Module: Created Language resource with CRUD pages, schemas, and models to support the universal translation system. Implemented localization for English and Turkish, ensuring consistent user experience. Added necessary policies and seeder for initial language data, enhancing the overall language management functionality.

app/Models/Language.php

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+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+class Language extends Model
+{
+    use HasFactory, SoftDeletes;
+
+    protected $fillable = [
+        'code',
+        'name',
+        'native_name',
+        'flag',
+        'direction',
+        'is_active',
+        'is_default',
+        'sort_order',
+        'created_by',
+        'updated_by',
+    ];
+
+    protected $casts = [
+        'is_active' => 'boolean',
+        'is_default' => 'boolean',
+        'sort_order' => 'integer',
+    ];
+
+    /**
+     * Boot method
+     */
+    protected static function boot(): void
+    {
+        parent::boot();
+
+        // Only one default language allowed
+        static::saving(function ($language) {
+            if ($language->is_default) {
+                static::where('id', '!=', $language->id)->update(['is_default' => false]);
+            }
+        });
+    }
+
+    /**
+     * Relationships
+     */
+    public function translations(): HasMany
+    {
+        return $this->hasMany(Translation::class, 'language_code', 'code');
+    }
+
+    public function userLanguages(): HasMany
+    {
+        return $this->hasMany(UserLanguage::class, 'language_code', 'code');
+    }
+
+    public function creator(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
+    public function updater(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'updated_by');
+    }
+
+    /**
+     * Scopes
+     */
+    public function scopeActive($query)
+    {
+        return $query->where('is_active', true);
+    }
+
+    public function scopeOrdered($query)
+    {
+        return $query->orderBy('sort_order')->orderBy('name');
+    }
+
+    /**
+     * Helpers
+     */
+    public static function getDefault(): ?self
+    {
+        return static::where('is_default', true)->first();
+    }
+
+    public static function getActive(): \Illuminate\Database\Eloquent\Collection
+    {
+        return static::active()->ordered()->get();
+    }
+
+    public static function findByCode(string $code): ?self
+    {
+        return static::where('code', $code)->first();
+    }
+
+    public function activate(): bool
+    {
+        $this->is_active = true;
+        return $this->save();
+    }
+
+    public function deactivate(): bool
+    {
+        if ($this->is_default) {
+            return false; // Cannot deactivate default language
+        }
+        $this->is_active = false;
+        return $this->save();
+    }
+
+    public function setAsDefault(): bool
+    {
+        $this->is_default = true;
+        $this->is_active = true;
+        return $this->save();
+    }
+}