[FEATURE] Show total issues count in results header

[ascender1729]

Description

Display the total count of issues found in the results header area.

Why Needed

• Users want to know how many issues match their search
• Helps set expectations for scrolling
• Standard search results pattern

Implementation Details

• Display count above or near results list
• Format: 'Found X issues' or 'X beginner-friendly issues'
• Update count when filters change
• Handle zero results gracefully

Files to Modify

• src/components/results/ResultsContainer.svelte

Code Example

<p class="text-gray-400 mb-4">
  Found {issues.length} beginner-friendly issues
</p>

Acceptance Criteria

• Total count displayed prominently
• Updates when search/filters change
• Grammatically correct (1 issue vs 2 issues)
• Shows 'No issues found' for empty results

Time Estimates

• With AI: 120 minutes
• Without AI: 840 minutes