Add support for simple structs and var inits

tests/generators/nim/test_struct_init.c

@@ -0,0 +1,8 @@
+int main() {
+    struct account account = {
+        123,
+        "Pan",
+        "Jan",
+        33.433
+    };
+}

tests/generators/nim/test_struct_init.nim

@@ -0,0 +1,2 @@
+proc main(): cint =
+  var account = account @ {123, "Pan", "Jan", 33.433}

tests/generators/nim/test_struct_simple_def.c

@@ -0,0 +1,6 @@
+struct account {
+   int account_number;
+   char *first_name;
+   char *last_name;
+   float balance;
+};

tests/generators/nim/test_struct_simple_def.nim

@@ -0,0 +1,6 @@
+type
+  account = object
+    account_number: cint
+    first_name: cstring
+    last_name: cstring
+    balance: cfloat

tests/generators/nim/test_struct_simple_def_alias.c

@@ -0,0 +1,6 @@
+struct account {
+   int account_number;
+   char *first_name;
+   char *last_name;
+   float balance;
+} alias_name;

tests/generators/nim/test_struct_simple_def_alias.nim

@@ -0,0 +1,6 @@
+type
+  alias_name = object
+    account_number: cint
+    first_name: cstring
+    last_name: cstring
+    balance: cfloat

tests/generators/nim/test_var_init_func.c

@@ -0,0 +1,4 @@
+int main() {
+    int x = some_func();
+    x = some_func();
+}

tests/generators/nim/test_var_init_func.nim

@@ -0,0 +1,3 @@
+proc main(): cint =
+  var x: cint = some_func()
+  x = some_func()