Add some sample files

samples/application_x-shellscript.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo "This is an example shell file"

samples/text_markdown.md

@@ -0,0 +1,3 @@
+# Markdown
+
+This is an example markdown file

samples/text_rust.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("This is an example Rust source file");
+}

samples/text_x-chdr.h

@@ -0,0 +1 @@
+// This is an example C header file

samples/text_x-csrc.c

@@ -0,0 +1,5 @@
+#include <stdio.h>
+
+int main(int argc, char **argv) {
+    printf("This is an example C source file\n");
+}