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/epubreader/ChapterWebView.kt

@@ -975,7 +975,7 @@ fun ChapterWebView(
                         }
 
                         // 3. Dictionary Option (Preserving Logic)
-                        if (!isOss && state.selectedText.length <= 2000) {
+                        if (state.selectedText.length <= 2000) {
                             HorizontalDivider()
                             Row(
                                 modifier = Modifier
@@ -983,12 +983,7 @@ fun ChapterWebView(
                                     .clickable {
                                         val textToDefine = state.selectedText
                                         if (textToDefine.isNotBlank()) {
-                                            val wordCount = countWords(textToDefine)
-                                            if (isProUser || wordCount <= 1) {
-                                                onWordSelectedForAiDefinition(textToDefine)
-                                            } else {
-                                                onShowDictionaryUpsellDialog()
-                                            }
+                                            onWordSelectedForAiDefinition(textToDefine)
                                         }
                                         customMenuState = null
                                     }