The update script would only fetch the few grammars listed in the
tree-sitter repository previously. But the tree-sitter github orga has
a rather large amount of officially supported grammars.

Thus we change the script to query the github APIs for repositories
instead (up to 100 this is supported without paging).

Since the repository list also contains some that are not grammars,
there is a bash script which lists all repos we are aware of and the
ones we want to ignore. It will make sure we don’t forget any
repositories in the future, by comparing to the actual list with jq.

The new update scripts gives us a bunch of new grammars!

We want the ability to add different orga repos as well, and that is a
lot easier on the nix level.

Some of the grammars are not in the official orga, like
tree-sitter-lua, so we make sure the updater knows how to fetch them.

…mars

Tree sitter fetch all grammars