feat: add std example

Cargo.toml

@@ -36,3 +36,7 @@ btparse = { git = "https://github.com/yaahc/btparse.git", rev = "54f9ddb8c7c8f8e
 [[example]]
 name = "fmt_to_string"
 required-features = ["use-backtrace-crate"]
+
+[[example]]
+name = "fmt_to_string_std"
+required-features = ["use-btparse-crate"]

examples/fmt_to_string_std.rs

@@ -0,0 +1,25 @@
+use color_backtrace::BacktracePrinter;
+
+fn main() -> Result<(), std::io::Error> {
+    // Start your trace
+    let trace = std::backtrace::Backtrace::force_capture();
+
+    // Do stuff...
+
+    // And print!
+    let bt = color_backtrace::btparse::deserialize(&trace).unwrap();
+    let printer = BacktracePrinter::default();
+    let str = printer.format_trace_to_string(&bt)?;
+
+    if cfg!(windows) {
+        println!(
+            "Warning: on Windows, you'll have to enable VT100 \
+             printing for your app in order for this to work \
+             correctly. This example doesn't do this."
+        );
+    }
+
+    println!("{}", str);
+
+    Ok(())
+}