Update search and helm filetype config

lua/core/filetypes.lua

@@ -1,11 +1,26 @@
+local function has_ancestor_file(path, filename)
+  local dir = vim.fs.dirname(path)
+  while dir and dir ~= '' do
+    if vim.uv.fs_stat(vim.fs.joinpath(dir, filename)) then
+      return true
+    end
+
+    local parent = vim.fs.dirname(dir)
+    if not parent or parent == dir then
+      return false
+    end
+    dir = parent
+  end
+  return false
+end
+
 vim.filetype.add({
   pattern = {
-    ['.*/templates/.*%.ya?ml'] = 'helm',
-    ['.*/manifests/.*%.ya?ml'] = 'helm',
-    ['.*/crds/.*%.ya?ml'] = 'helm',
-    ['.*/kubernetes/.*%.ya?ml'] = 'helm',
-    ['.*/k8s/.*%.ya?ml'] = 'helm',
-    ['.*/charts/.*%.ya?ml'] = 'helm',
+    ['.*/templates/.*%.ya?ml'] = function(path)
+      if has_ancestor_file(path, 'Chart.yaml') then
+        return 'helm'
+      end
+    end,
   },
   extension = {
     gotmpl = 'helm',