Start working on new interactive runner

sources/c/example/assignment.toml

@@ -0,0 +1,9 @@
+name = "example"
+given-date = "3/11/2022"
+description = "This is an example entry for C"
+directions = """
+Print "Example" 10 times.
+"""
+
+[compile]
+main-file = "example.c"

sources/c/example/example.c

@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main() {
+    for (int i = 0; i < 10; i++) {
+        printf("Example");
+    }
+    return 0;
+}