feat(otter.lua): add support for embedding Python and Lua languages in Otter

lua/absolute/after/otter.lua

@@ -0,0 +1,15 @@
+local otter = require("otter")
+
+-- table of embedded languages to look for.
+-- required (no default)
+local languages = { "python", "lua" }
+
+-- enable completion/diagnostics
+-- defaults are true
+local completion = true
+local diagnostics = true
+-- treesitter query to look for embedded languages
+-- uses injections if nil or not set
+local tsquery = nil
+
+otter.activate(languages, completion, diagnostics, tsquery)