Add TextasticPro tweak, assets, and update README

TextasticPro/Tweak.x

@@ -0,0 +1,32 @@
+#import <substrate.h>
+#import <mach-o/dyld.h>
+#import <string.h>
+#import <Foundation/Foundation.h>
+
+%hook TextasticStore
+- (bool)textasticProActive {
+    return TRUE;
+}
+- (bool)isVPPReceipt {
+    return FALSE;
+}
+- (bool)isLegacyPurchase {
+    return TRUE;
+}
+- (bool)isLegacyPurchaseOrProActive {
+    return TRUE;
+}
+- (bool)isLegacyPurchaseOrProActiveOrTestFlight {
+    return TRUE;
+}
+%end
+
+// iOS 16 Crash Fix
+%hook CKContainer
++ (id)defaultContainer {
+    return nil;
+}
++ (id)containerWithIdentifier:(id) arg1 {
+    return nil;
+}
+%end