feat(panel): remove full mode, rename compact to standard and fixed some UI (#328)

* feat(panel): remove full mode, rename compact to standard

- Remove panel-full entry (660×340) and all full-mode code paths
- Rename compact → standard across panel, settings, translations
- Restrict tile hover/click to icon+label only (no border hover)
- Shrink close button to 24×24 with 12px glyph
- Reduce standard section vertical padding to 4px
- Standard panel height: 290 → 260 (matches legacy at 260)
- Fix widget/shortcut/service toggle to respect panel-mode setting
- Update README with correct sizes and behavior

* added new thumbnail.webp

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Co-authored-by: Ahmed5Emad <ahmed5emad@users.noreply.github.com>

screen-toolkit/widget.luau

@@ -56,8 +56,8 @@ function onClick()
   -- The bar icon never stops a recording; it just opens the panel so the
   -- stop button (in the panel header, next to the close X) is reachable.
   local mode = noctalia.getConfig("panel-mode")
-  local panelId = mode == "full" and "alexander/screen-toolkit:panel-full" or (mode == "legacy" and "alexander/screen-toolkit:panel-legacy" or "alexander/screen-toolkit:panel")
-  noctalia.togglePanel(panelId)
+  local id = (mode == "legacy") and "alexander/screen-toolkit:panel-legacy" or "alexander/screen-toolkit:panel"
+  noctalia.togglePanel(id)
 end
 
 function onRightClick()