Add tasks for all the new languages

Task/Find-common-directory-path/Lasso/find-common-directory-path.lasso

@@ -0,0 +1,17 @@
+#!/usr/bin/lasso9
+
+local(
+	path1 = '/home/user1/tmp/coverage/test' -> split('/'),
+	path2 = '/home/user1/tmp/covert/operator' -> split('/'),
+	path3 = '/home/user1/tmp/coven/members' -> split('/')
+)
+
+define commonpath(...) => {
+	local(shared = #rest -> get(1))
+	loop(#rest -> size - 1) => {
+		#shared = #shared -> intersection(#rest -> get(loop_count + 1))
+	}
+	return #shared -> join('/')
+}
+
+stdoutnl(commonpath(#path1, #path2, #path3))