refactor: rename RDReaderView -> RDEpubReaderView, update pod config and docs

- Rename source module from RDReaderView to RDEpubReaderView
- Move all source files from Sources/RDReaderView/ to Sources/RDEpubReaderView/
- Update podspec: RDReaderView.podspec -> RDEpubReaderView.podspec
- Update Podfile, demo project, and CocoaPods config for new pod name
- Delete old RDReaderView pod support files from ReadViewDemo/Pods
- Add new RDEpubReaderView pod support files
- Update documentation (API ref, architecture, UML, conventions, etc.)
- Add FixedLayoutRotationTests
- Update .gitignore: exclude .DS_Store, manual unpack backups, _ssoft-output

Sources/RDEpubReaderView/ReaderView/Paging/RDEpubReaderTapRegionHandler.swift

@@ -0,0 +1,29 @@
+
+import CoreGraphics
+
+struct RDEpubReaderTapRegionHandler {
+
+    func resolveTapEvent(
+        point: CGPoint,
+        viewFrame: CGRect,
+        isToolViewVisible: Bool
+    ) -> RDEpubReaderView.TapEvent {
+        let leftFrame = CGRect(x: 0, y: 0, width: viewFrame.width / 3, height: viewFrame.height)
+        let centerFrame = CGRect(x: viewFrame.width / 3, y: 0, width: viewFrame.width / 3, height: viewFrame.height)
+        let rightFrame = CGRect(x: viewFrame.width * 2 / 3, y: 0, width: viewFrame.width / 3, height: viewFrame.height)
+
+        if leftFrame.contains(point) {
+            return isToolViewVisible ? .center : .left
+        }
+
+        if centerFrame.contains(point) {
+            return .center
+        }
+
+        if rightFrame.contains(point) {
+            return isToolViewVisible ? .center : .right
+        }
+
+        return .none
+    }
+}