PR: Add validation prehooks

hooks/pre_gen_project.py

@@ -0,0 +1,14 @@
+import re
+import sys
+
+PLUGIN_REGEX = r'^[a-zA-Z][ a-zA-Z0-9]+$'
+
+plugin_name = '{{ cookiecutter.plugin_name }}'
+
+if not re.match(PLUGIN_REGEX, plugin_name):
+    print('ERROR: {}'.format(plugin_name),
+          'Plugin name should starts by a letter',
+          'And containts only letters, numbers or spaces')
+
+    # exits with status 1 to indicate failure
+    sys.exit(1)