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/presentation/src/main.rs

@@ -0,0 +1,9 @@
+use anyhow::Result;
+use clap::Parser;
+
+use archlens::Cli;
+
+fn main() -> Result<()> {
+    let args = Cli::parse();
+    archlens::run(args)
+}