* Previously, it displayed the last known location when selecting a folder for external storage, which could confuse the user. We have now resolved this by defaulting to opening the SD card when choosing the SD card folder.
* Introduced the 'Support kiwix' option, which is configurable in the navigation for custom apps. If the custom app is set to display the "Support" menu item in navigation, it will be shown; otherwise, it will be hidden from the app.
* Replaced the "kiwix" and "the" prefixes in "Support kiwix" and "About the app" with the app name in the navigation.
* The getEntryByPath method was being called twice when retrieving content. Consequently, the initial call returned the content entry URL with additional parameters. Subsequently, when making the second call with the provided URL, it resulted in an "entry not found" exception. This issue prevented the loading of the CSS and content of the Zim file.
* Additionally, the getActualUrl method was primarily implemented to retrieve the redirect entry of the URL provided by the webView. It is unnecessary to invoke this method when obtaining content.
* Introduced test cases for the new functionality to ensure its expected behavior in both variants, such as Play Store and non-Play Store.
* Updated other test cases to accommodate the testing of this new functionality.
* If the custom app is configured to display the 'About the app' option in navigation, it will be visible. Clicking on it will redirect the user to the configured URL.
* Scan the app-specific directory as well because we have limitations in scanning all directories on Android 11 and above in the Play Store variant. If a user copies the ZIM file to the app-specific directory on the SD card, the scanning of the app-specific directory on the SD card has not been added, resulting in the copied files not being displayed on the library screen. Therefore, we need to explicitly include the app-specific directory for scanning.
* If the ManageExternalStorage permission has not been granted, introduce the request, particularly when accessing features that necessitate this permission, such as downloading ZIM files, selecting a ZIM file from storage via the file picker, and refreshing the list of available ZIM files in storage.
* We have introduced the option to disable external links for custom apps. If a custom app is configured not to display the external links popup, it will both hide the external links preference from settings and refrain from showing the external link popup when opening external links. Additionally, we have included relevant comments within the methods and code to provide developers with a clear understanding of the reasons behind these changes.
* Removed the unnecessary estimation matches call on `libkiwix`, as we do not need this since `libkiwix` can handle this automatically.
* Cancelled the previously running job if a new searchTerm is in progress; this will avoid unnecessary memory allocation and data load on libkiwix.
* Introduced a search placeholder for custom apps; if any custom app is configured not to show the title in the toolbar, it will display the search placeholder with a border. To implement this change, a layout has been added inside the toolbar.
* To enhance understanding of this change, proper comments have been added to the methods.
* We had restricted the toolbar click to the toolbar title. So, if the user clicked on the title, it would initiate the search. Now, we have removed the restriction of clicking only on the title. If the user taps anywhere on the toolbar except the menu items and hamburger, it will initiate the search.
