Initial commit: JMESPath Testing Tool

- React-based web application for testing JMESPath expressions
- macOS-first containerization with Apple container command
- Bootstrap UI with real-time evaluation
- GitHub Actions CI/CD pipeline
- Docker fallback support
- Comprehensive documentation and development scripts

src/index.css

@@ -0,0 +1,83 @@
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+  background-color: #f8f9fa;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
+    monospace;
+}
+
+.container-fluid {
+  height: 100vh;
+  display: flex;
+  flex-direction: column;
+}
+
+.content-section {
+  flex: 1;
+  min-height: 0;
+}
+
+.textarea-container {
+  height: 100%;
+  display: flex;
+  flex-direction: column;
+}
+
+.form-control {
+  resize: vertical;
+  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
+  font-size: 14px;
+}
+
+.input-section .form-control {
+  flex: 1;
+  min-height: 200px;
+}
+
+.output-section .form-control {
+  flex: 1;
+  min-height: 200px;
+  background-color: #f8f9fa;
+}
+
+.error {
+  background-color: #f8d7da !important;
+  border-color: #f5c6cb !important;
+  color: #721c24;
+}
+
+.success {
+  background-color: #d4edda !important;
+  border-color: #c3e6cb !important;
+  color: #155724;
+}
+
+.header-section {
+  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+  color: white;
+  padding: 2rem 0;
+  margin-bottom: 2rem;
+}
+
+.jmespath-input {
+  background-color: #fff3cd;
+  border-color: #ffeaa7;
+  font-weight: 500;
+}
+
+.json-input {
+  background-color: #e8f5e8;
+  border-color: #c3e6cb;
+}
+
+.result-output {
+  background-color: #e7f3ff;
+  border-color: #b3d7ff;
+}