itemactions: Add context menu actions to hide and unhide files using .hidden

Summary:
This patch introduces context menu actions that allow users to hide or unhide selected files by editing the .hidden file in their parent directories.

What this patch does:
- Implemented HideFileItemAction plugin based on KAbstractFileItemActionPlugin
- Plugin is disabled by default unless explicitly enabled in kservicemenurc via the hidefileitemaction key
- "Hide" action adds selected file names to the .hidden file, avoiding duplicates
- "Unhide" action removes selected file names from the .hidden file
- Action visibility logic:
	- If only visible or only hidden files are selected, only the relevant action is shown
	- If both are selected, both "Hide" and "Unhide" actions are shown
- Write permission checks ensure actions are disabled if the .hidden file cannot be modified
- Optimized redundant path computations by calculating parent directory and .hidden file paths once and reusing them

1 files changed, 11 insertions, 0 deletions

diff --git a/src/itemactions/CMakeLists.txt b/src/itemactions/CMakeLists.txt
index 6610b0e4a..cd196eb36 100644
--- a/src/itemactions/CMakeLists.txt
+++ b/src/itemactions/CMakeLists.txt
@@ -11,6 +11,16 @@ target_link_libraries(movetonewfolderitemaction
     KF6::KIOWidgets
     KF6::KIOFileWidgets)
 
+#hidefileitemaction plugin
+kcoreaddons_add_plugin(hidefileitemaction
+    SOURCES hidefileitemaction.cpp hidefileitemaction.h
+    INSTALL_NAMESPACE "kf6/kfileitemaction")
+
+target_link_libraries(hidefileitemaction
+    KF6::CoreAddons
+    KF6::I18n
+    KF6::KIOCore
+    KF6::KIOWidgets)
 
 if(NOT WIN32)
     # setfoldericon plugin
@@ -24,3 +34,4 @@ if(NOT WIN32)
         KF6::KIOCore
         KF6::KIOWidgets)
 endif()
+