feat: rust-based `toJSON`

.gitignore

@@ -1,6 +1,7 @@
 /bin/
 /build/
-**/.idea/
+/.idea/
 /assets/*.txt
+/to-json/target/
 /cmake-build-debug/
 /cmake-build-release/

to-json/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "to-json"
+version = "0.1.0"

to-json/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "to-json"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

to-json/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}