Add License

TeX/jam.sty

@@ -1,3 +1,17 @@
+% Copyright 2021-2023 Ian Jauslin
+% 
+% Licensed under the Apache License, Version 2.0 (the "License");
+% you may not use this file except in compliance with the License.
+% You may obtain a copy of the License at
+% 
+%     http://www.apache.org/licenses/LICENSE-2.0
+% 
+% Unless required by applicable law or agreed to in writing, software
+% distributed under the License is distributed on an "AS IS" BASIS,
+% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+% See the License for the specific language governing permissions and
+% limitations under the License.
+
 % square lattice (width #1, height #2, origin #3, spacing #4)
 \def\grid#1#2#3{
   \foreach\i in {0,...,#2}{