implemented addfile script

addfile

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+
+if test ! -f "project.yml"; then
+    echo -e "no project.yml was found -> generation failed\nplease run this command from the root of the project directory"
+    exit 1
+fi
+if test -z $1; then
+    echo "no file path was provided -> generation failed"
+    exit 1
+fi
+
+name="$(basename $1)"
+mkdir -p "test/$(dirname $1)"
+mkdir -p "src/$(dirname $1)"
+
+testcontent="#include \"unity.h\"\n#include \"$1.h\"\n\nvoid setUp(void){}\nvoid tearDown(void){}"
+filecontent="#include \"$name.h\""
+headercontent="#ifndef ${name^^}_H\n#define ${name^^}_H\n\n\n#endif"
+
+if test -e "test/test_$1.c"; then
+    echo "the file test/test_$1.c already exists -> generation failed"
+    exit 1
+fi
+if test -e "src/$1.c"; then
+    echo "the file src/$1.c already exists -> generation failed"
+    exit 1
+fi
+if test -e "src/$1.h"; then
+    echo "the file src/$1.h already exists -> generation failed"
+    exit 1
+fi
+
+echo -e $testcontent > "test/test_$1.c"
+echo -e $filecontent > "src/$1.c"
+echo -e $headercontent > "src/$1.h"