feat: Update GitHub Actions workflows for QRCoder.Core

- Replace Metar Decoder references with QRCoder.Core
- Update solution file references (QRCoder.Core.sln)
- Fix project paths (QRCoder.Core.Tests/)
- Add performance test support for QRCoder.Core.Benchmarks
- Create dedicated NuGet publishing workflow
- Fix codecov action parameter (files instead of file)
- Add support for manual and tag-based publishing
- Include GitHub Releases creation
- Add comprehensive artifact management
- Fix secret handling for NUGET_API_KEY

Author: afonsoft

.github/workflows/auto-pr-from-main.yml

@@ -40,7 +40,7 @@ jobs:
           git checkout -b $BRANCH_NAME
 
           # List outdated packages
-          dotnet list package --outdated 
+          dotnet list MetarDecoder.sln package --outdated 
 
           # Update packages (this is a simplified approach)
           echo "📦 Updating NuGet packages..."
@@ -112,7 +112,7 @@ jobs:
             --base main \
             --head $BRANCH_NAME \
             --label "dependencies,auto-update" \
-            --assignee ${{ github.event.head_commit.author.username }} || echo "PR already exists or creation failed"
+            --assignee afonsoft || echo "PR already exists or creation failed"
 
           echo "✅ Dependency update PR created successfully"
 
@@ -154,10 +154,10 @@ jobs:
           echo "🔒 Checking for security-related package updates..."
 
           # Check for vulnerable packages
-          dotnet list package --vulnerable
+          dotnet list MetarDecoder.sln package --vulnerable
 
           # Create update branch if vulnerabilities found
-          if dotnet list package --vulnerable | grep -q "vulnerable"; then
+          if dotnet list MetarDecoder.sln package --vulnerable | grep -q "vulnerable"; then
             echo "🚨 Security vulnerabilities detected, creating update PR..."
             
             BRANCH_NAME="security-update-$(date +%Y%m%d-%H%M%S)"