Add language scaffolding: manifest, gitignore, editorconfig

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013kj58Jugkic783b8ZrtTVZ

.editorconfig

@@ -0,0 +1,17 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+
+[*.{rs,toml}]
+indent_size = 4
+
+[*.{py,dart,json,yaml,yml}]
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false

.gitignore

@@ -0,0 +1,4 @@
+/target
+*.pdb
+
+# Cargo.lock IS committed: these crates build binaries, not libraries.

Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "svc-nav"
+version = "0.1.0"
+edition = "2021"
+description = "Navigation service: routing and guidance"
+publish = false
+
+[dependencies]

rust-toolchain.toml

@@ -0,0 +1,2 @@
+[toolchain]
+channel = "stable"

src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("{} is not implemented yet", env!("CARGO_PKG_NAME"));
+}