move additional plugin cmd specs to a centralized location

lua/data/cmd.lua

@@ -19,6 +19,23 @@ M.codesnap = {
   'CodeSnapASCII',
 }
 
+--- DiffView plugin cmds
+M.diffview = {
+  'DiffviewOpen',
+  'DiffviewClose',
+  'DiffviewToggleFiles',
+  'DiffviewFocusFiles',
+  'DiffviewRefresh',
+  'DiffviewFileHistory',
+}
+
+--- FloatingHelp plugin cmds
+M.floating_help = {
+  'FloatingHelp',
+  'FloatingHelpClose',
+  'FloatingHelpToggle',
+}
+
 --- Gists plugin cmds
 M.gist = {
   'GistCreate',
@@ -31,6 +48,13 @@ M.gx = {
   'Browse',
 }
 
+--- ImgClip plugin cmds
+M.imgclip = {
+  'ImgClipEmbed',
+  'PasteImage',
+  'ImgClipConfig',
+}
+
 --- Kitty-Scrollback plugin cmds
 M.kitty_scrollback = {
   'KittyScrollbackGenerateKittens',
@@ -46,6 +70,13 @@ M.lazygit = {
   'LazyGitFilterCurrentFile',
 }
 
+--- Markdown-preview plguin cmds
+M.markdown_preview = {
+  'MarkdownPreviewToggle',
+  'MarkdownPreview',
+  'MarkdownPreviewStop',
+}
+
 --- Nekifoch plugin cmds
 M.nekifoch = 'Nekifoch'
 
@@ -74,10 +105,19 @@ M.ripsub = {
   'RipSubstitute',
 }
 
+--- Spell Errors plugin cmds
 M.spell_errors = {
   'Telescope spell_errors',
 }
 
+--- Symbols plugin cmds
+M.symbols = {
+  'Symbols',
+  'SymbolsToggle',
+  'SymbolsOpen',
+  'SymbolsClose',
+}
+
 --- Suda plugin cmds
 M.suda = {
   'SudaWrite',