Offline dictionary (#45)

* Added support for external dictionary apps and a dictionary settings sheet.

* Refactored external dictionary integration and improved package visibility

 - Updated `AndroidManifest.xml` with `<queries>` for common dictionary apps and intent actions (`PROCESS_TEXT`, `SEARCH`, `SEND`) to support Android 11+ package visibility.
 - Refactored `ExternalDictionaryHelper` to streamline dictionary discovery using `Intent.ACTION_PROCESS_TEXT` and `colordict.intent.action.SEARCH`.
 - Added a package blocklist in `ExternalDictionaryHelper` to filter out system services (e.g., Samsung Pass, GMS) from dictionary lists.
  - Simplified `launchDictionary` logic to prioritize `PROCESS_TEXT` intents.
 - Fixed a bug in `PdfViewerScreen` to only show the dictionary upsell dialog when `useOnlineDictionary` is enabled.

* Refactored dictionary settings into a dialog and updated dictionary selection logic.

- Renamed `DictionarySettingsSheet` to `DictionarySettingsDialog` and converted it from a bottom sheet to a formal dialog.
- Redesigned the dictionary settings UI with a clearer distinction between AI and external app modes.
- Added a "Search" option to the external dictionary list that triggers a web search.
- Updated `ExternalDictionaryHelper` to include a package blocklist and support for generic web search intents.
- Simplified `PdfHelper` by removing Pro user checks for the "Dictionary" action.
- Updated icons for dictionary settings across the EPUB and PDF readers.

app/src/main/java/com/aryan/reader/pdf/PdfPageComposable.kt

@@ -4557,9 +4557,7 @@ private fun PdfPageRenderer(
                     popupPositionProvider = popupPositionProvider,
                     onCopy = onCopy,
                     onAiDefine = onAiDefine,
-                    onSelectAll = onSelectAll,
-                    isProUser = isProUser,
-                    onShowUpsellDialog = onShowUpsellDialog
+                    onSelectAll = onSelectAll
                 )
             }
         }