integrate lsp-ui with flychecker (develop branch)

[dagadbm]

Apparently lsp-ui is already included in the javascript/react layer but flychecker isn't using it. I get this message when i do SPC e v:

The following syntax checkers are not registered:

• lsp-ui

Try adding these syntax checkers to `flycheck-checkers'. Flycheck Mode is
enabled. Use SPC u C-c ! x to enable disabled checkers.

Shouldn't this be done automatically by the layer or by flychecker?

How to fix this? (Should this be addresed by the layer)

[mspinelli]

@dagadbm Adding the last line below seemed to work for me in dotspacemacs/user-config ()

  (require 'lsp-mode)
  (require 'lsp-ui)
  (add-hook 'lsp-mode-hook 'lsp-ui-mode)
  (add-hook 'lsp-ui-mode-hook 'flycheck-mode)

At least fixing that error. But sadly linting still isn't working. See AdamNiederer/vue-mode#84

[msuess]

<SPC e v> is looking good on a fresh pull, with lsp-ui being enabled and executable and config file being reported as found.

Flycheck does not show any errors however.

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Please let us know if this issue is still valid!