init: archlens — architecture diagram generator

Hex arch + DDD, tree-sitter parsing, Mermaid/ASCII output.
Supports Rust + Python. 92 tests. CI, diff, --check for staleness detection.

crates/domain/src/value_objects/output/output_config.rs

@@ -0,0 +1,25 @@
+#[derive(Debug, Clone, Default)]
+pub struct OutputConfig {
+    split_by_module: bool,
+    output_path: Option<String>,
+}
+
+impl OutputConfig {
+    pub fn with_split_by_module(mut self, split: bool) -> Self {
+        self.split_by_module = split;
+        self
+    }
+
+    pub fn with_output_path(mut self, path: String) -> Self {
+        self.output_path = Some(path);
+        self
+    }
+
+    pub fn split_by_module(&self) -> bool {
+        self.split_by_module
+    }
+
+    pub fn output_path(&self) -> Option<&str> {
+        self.output_path.as_deref()
+    }
+}