add custom search #2
Description
https://cse.google.com/cse?cx=011868766723427137892:jpmxeesvyix
This Custom Google Search indexes:
We should embed it:
- on the Landing page (https://radis.github.io/radis-radiation/)
- On readthedocs as a replacement of the default Sphinx search. See https://stackoverflow.com/a/54960856/5622825 (first attempt radis/radis@e108625 didnt work)