Fix help file: correct vimwiki-compatible form and ensure all commands are in Nuwiki form

doc/nuwiki.txt

@@ -234,7 +234,7 @@ Vim-specific globals ~
 
 All commands are available in both forms:
 - Canonical form: :Nuwiki*
-- Vimwiki-compatible form: :Nuwiki*
+- Vimwiki-compatible form: :Vimwiki*
 
 Every command listed below is registered buffer-logic on `.wiki` files.
 Only the `:Nuwiki*` form is shown in this document for brevity.
@@ -527,7 +527,7 @@ The `diary_frequency` per-wiki option controls the cadence:
   monthly   YYYY-MM          e.g. `2026-05.wiki`
   yearly    YYYY             e.g. `2026.wiki`
 
-`:VimwikiMakeDiaryNote` opens the entry for the current period at the
+`:NuwikiMakeDiaryNote` opens the entry for the current period at the
 configured cadence; the yesterday / tomorrow commands step back and
 forward by one period. `<C-Down>` / `<C-Up>` walk between indexed
 entries of the same flavour as the one under the cursor — so on a
@@ -535,7 +535,7 @@ weekly page, navigation stays weekly.
 
 Index ~
 
-`:VimwikiDiaryGenerateLinks` rebuilds the diary index page (`diary.wiki`
+`:NuwikiDiaryGenerateLinks` rebuilds the diary index page (`diary.wiki`
 by default) with a chronological list of every entry on disk, grouped
 by year / month. The page name is set by `diary_index`; the heading is
 set by `diary_header`.
@@ -569,8 +569,8 @@ column moves, cell navigation, new-row insertion).
 ==============================================================================
 11. HTML EXPORT                                                 *nuwiki-html*
 
-`:Vimwiki2HTML` renders the current page; `:Vimwiki2HTMLBrowse` opens
-the result in the default browser; `:VimwikiAll2HTML` exports every
+`:Nuwiki2HTML` renders the current page; `:Nuwiki2HTMLBrowse` opens
+the result in the default browser; `:NuwikiAll2HTML` exports every
 page (incremental by default; `!` forces a full rebuild).
 
 Per-wiki knobs:
@@ -584,7 +584,7 @@ Per-wiki knobs:
   `exclude_files`       Glob patterns excluded from export.
 
 Templates may include `{title}`, `{rootpath}`, `{content}`, `{css}`,
-`{date}` placeholders. RSS for the diary is written by `:VimwikiRss`.
+`{date}` placeholders. RSS for the diary is written by `:NuwikiRss`.
 
 ==============================================================================
 12. FOLDING                                                  *nuwiki-folding*
@@ -636,7 +636,7 @@ match vimwiki. To migrate:
 
 Existing pages, diary entries, tags, and templates work without
 modification. The first workspace scan after launch may show an empty
-`:VimwikiCheckLinks` result until the background index completes;
+`:NuwikiCheckLinks` result until the background index completes;
 subsequent runs are instant.
 
  vim:tw=78:ts=8:ft=help:norl: