added affiliation tab card with its information

app/Models/ClubAffiliation.php

@@ -0,0 +1,93 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+class ClubAffiliation extends Model
+{
+    protected $fillable = [
+        'member_id',
+        'club_name',
+        'logo',
+        'start_date',
+        'end_date',
+        'location',
+        'coaches',
+        'description',
+    ];
+
+    protected $casts = [
+        'start_date' => 'date',
+        'end_date' => 'date',
+        'coaches' => 'array',
+    ];
+
+    /**
+     * Get the member that owns the affiliation.
+     */
+    public function member(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'member_id');
+    }
+
+    /**
+     * Get the skills acquired during this affiliation.
+     */
+    public function skillAcquisitions(): HasMany
+    {
+        return $this->hasMany(SkillAcquisition::class);
+    }
+
+    /**
+     * Get the media associated with this affiliation.
+     */
+    public function affiliationMedia(): HasMany
+    {
+        return $this->hasMany(AffiliationMedia::class);
+    }
+
+    /**
+     * Get the duration of the affiliation in months.
+     */
+    public function getDurationInMonthsAttribute(): int
+    {
+        $endDate = $this->end_date ?? now();
+        return $this->start_date->diffInMonths($endDate);
+    }
+
+    /**
+     * Get formatted date range.
+     */
+    public function getDateRangeAttribute(): string
+    {
+        $start = $this->start_date->format('M Y');
+        $end = $this->end_date ? $this->end_date->format('M Y') : 'Present';
+        return $start . ' – ' . $end;
+    }
+
+    /**
+     * Get detailed formatted duration (years, months, days).
+     */
+    public function getFormattedDurationAttribute(): string
+    {
+        $endDate = $this->end_date ?? now();
+        $diff = $this->start_date->diff($endDate);
+
+        $parts = [];
+
+        if ($diff->y > 0) {
+            $parts[] = $diff->y . ' year' . ($diff->y > 1 ? 's' : '');
+        }
+        if ($diff->m > 0) {
+            $parts[] = $diff->m . ' month' . ($diff->m > 1 ? 's' : '');
+        }
+        if ($diff->d > 0) {
+            $parts[] = $diff->d . ' day' . ($diff->d > 1 ? 's' : '');
+        }
+
+        return implode(' ', $parts) ?: 'Same day';
+    }
+}