Add exporters, utils, and tests

.termflow/exporters/graphviz_exporter.py

@@ -0,0 +1,26 @@
+"""Graphviz export functionality."""
+
+from typing import List, Optional
+
+
+class GraphvizExporter:
+    """Exports diagrams to Graphviz format."""
+
+    def generate_dot(
+        self,
+        commands: List[str],
+        title: str = "Command Flow",
+    ) -> str:
+        """Generate DOT graph."""
+        lines = ["digraph {\n", f'    label="{title}"\n', '    node [shape=box]\n\n']
+
+        for i, cmd in enumerate(commands):
+            safe_cmd = cmd.replace('"', '\\"')
+            lines.append(f'    n{i} [label="{safe_cmd}"]\n')
+
+            if i > 0:
+                lines.append(f'    n{{i-1}} -> n{{i}}\n')
+
+        lines.append("}\n")
+
+        return "".join(lines)