feat: add runOption, use with new groq chat

groq is openai compatible but requires auth token,
this lets us add an auth token after parsing chat prompt so we don't
need to stick tokens in plaintext

lua/model/core/chat.lua

@@ -8,6 +8,7 @@ local M = {}
 ---@field provider Provider The API provider for this prompt
 ---@field create fun(input: string, context: Context): string | ChatContents Converts input and context to the first message text or ChatContents
 ---@field run fun(messages: ChatMessage[], config: ChatConfig): table | fun(resolve: fun(params: table): nil ) ) Converts chat messages and config into completion request params
+---@field runOptions? fun(): table Builds additional options to merge into chat prompt options. E.g. for auth tokens that shouldn't be written to the chat config header.
 ---@field system? string System instruction
 ---@field params? table Static request parameters
 ---@field options? table Provider options
@@ -336,6 +337,10 @@ function M.run_chat(opts)
   local options = parsed.contents.config.options or {}
   local params = parsed.contents.config.params or {}
 
+  if type(chat_prompt.runOptions) == 'function' then
+    options = vim.tbl_deep_extend('force', options, chat_prompt.runOptions())
+  end
+
   if type(run_params) == 'function' then
     run_params(function(async_params)
       local merged_params = vim.tbl_deep_extend('force', params, async_params)

lua/model/prompts/chats.lua

@@ -9,6 +9,8 @@ local anthropic = require('model.providers.anthropic')
 local zephyr_fmt = require('model.format.zephyr')
 local starling_fmt = require('model.format.starling')
 
+local util = require('model.util')
+
 local function input_if_selection(input, context)
   return context.selection and input or ''
 end
@@ -213,6 +215,17 @@ local chats = {
       })
     end,
   },
+  groq = vim.tbl_deep_extend('force', openai_chat, {
+    params = {
+      model = 'llama3-70b-8192',
+    },
+    runOptions = function()
+      return {
+        url = 'https://api.groq.com/openai/v1/',
+        authorization = 'Bearer ' .. util.env('GROQ_API_KEY'),
+      }
+    end,
+  }),
 }
 
 return chats

lua/model/util/init.lua

@@ -61,7 +61,7 @@ local get_secret_once = M.memo(function(name)
 end)
 
 function M.env(name)
-  if M.secrets[name] then
+  if type(M.secrets[name]) == 'function' then
     return get_secret_once(name)
   else
     local value = vim.env[name]