Initial release: Go Jdenticon library v0.1.0

- Core library with SVG and PNG generation
- CLI tool with generate and batch commands
- Cross-platform path handling for Windows compatibility
- Comprehensive test suite with integration tests

.github/workflows/performance-regression.yml

@@ -0,0 +1,84 @@
+name: Benchmarks
+
+on:
+  pull_request:
+    paths:
+      - '**/*.go'
+      - 'go.mod'
+      - 'go.sum'
+  push:
+    branches: [main]
+    paths:
+      - '**/*.go'
+      - 'go.mod'
+      - 'go.sum'
+  workflow_dispatch:
+
+env:
+  GO_VERSION: "1.24"
+
+jobs:
+  benchmarks:
+    name: Run Benchmarks
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: ${{ env.GO_VERSION }}
+
+    - name: Download dependencies
+      run: go mod download
+
+    - name: Run benchmarks
+      run: |
+        go test -bench=. -benchmem -count=3 ./... | tee benchmark_results.txt
+
+    - name: Upload benchmark results
+      uses: actions/upload-artifact@v4
+      with:
+        name: benchmark-results
+        path: benchmark_results.txt
+        retention-days: 30
+
+    - name: Comment benchmark results on PR
+      if: github.event_name == 'pull_request'
+      uses: actions/github-script@v7
+      with:
+        script: |
+          const fs = require('fs');
+
+          let comment = '## 📊 Benchmark Results\n\n';
+
+          try {
+            if (fs.existsSync('benchmark_results.txt')) {
+              const benchmarks = fs.readFileSync('benchmark_results.txt', 'utf8');
+              const lines = benchmarks.split('\n').filter(line =>
+                line.includes('Benchmark') || line.includes('ns/op') || line.includes('ok')
+              );
+
+              if (lines.length > 0) {
+                comment += '```\n';
+                comment += lines.slice(0, 20).join('\n');
+                if (lines.length > 20) {
+                  comment += `\n... and ${lines.length - 20} more lines\n`;
+                }
+                comment += '\n```\n';
+              } else {
+                comment += 'No benchmark results found.\n';
+              }
+            }
+          } catch (error) {
+            comment += `⚠️ Could not read benchmark results: ${error.message}\n`;
+          }
+
+          github.rest.issues.createComment({
+            issue_number: context.issue.number,
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            body: comment
+          });