linting: fix typos, add toml validation (#7007)

- adds the `toml` plugin to the `eslint` linting → expect to have `options/setting/config.toml` by #6862
- fixes `make lint-codespell` commands
- related concerning `codespell`: #3270
- info: codespell check is and was not activated in the workflows (could maybe, runs only few seconds on my system)

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/7007
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Co-authored-by: Robert Wolff <mahlzahn@posteo.de>
Co-committed-by: Robert Wolff <mahlzahn@posteo.de>

models/user/redirect.go

@@ -69,7 +69,7 @@ func init() {
 }
 
 // GetUserRedirect returns the redirect for a given username, this is a
-// case-insenstive operation.
+// case-insensitive operation.
 func GetUserRedirect(ctx context.Context, userName string) (*Redirect, error) {
 	userName = strings.ToLower(userName)
 	redirect := &Redirect{LowerName: userName}