feat(templates): avanterules filetype support (closes #254) (#466)

Signed-off-by: Aaron Pham <contact@aarnphm.xyz>

lua/avante/init.lua

@@ -234,6 +234,15 @@ H.autocmds = function()
 
   -- automatically setup Avante filetype to markdown
   vim.treesitter.language.register("markdown", "Avante")
+
+  vim.filetype.add({
+    extension = {
+      ["avanterules"] = "jinja",
+    },
+    pattern = {
+      ["%.avanterules%.[%w_.-]+"] = "jinja",
+    },
+  })
 end
 
 ---@param current boolean? false to disable setting current, otherwise use this to track across tabs.
@@ -359,16 +368,6 @@ end)
 
 ---@param opts? avante.Config
 function M.setup(opts)
-  if vim.fn.has("nvim-0.10") == 0 then
-    vim.api.nvim_echo({
-      { "Avante requires at least nvim-0.10", "ErrorMsg" },
-      { "Please upgrade your neovim version", "WarningMsg" },
-      { "Press any key to exit", "ErrorMsg" },
-    }, true, {})
-    vim.fn.getchar()
-    vim.cmd([[quit]])
-  end
-
   ---PERF: we can still allow running require("avante").setup() multiple times to override config if users wish to
   ---but most of the other functionality will only be called once from lazy.nvim
   Config.setup(opts)