Moved BindingGenerator from gen html project. It makes more sense here.

Sources/BindingGenerator/Extensions/Url+Ext.swift

@@ -0,0 +1,68 @@
+//
+//  Url+Ext.swift
+//  gen_html
+//
+//  Created by Isaac Paul on 9/25/25.
+//
+
+import Foundation
+
+extension URL {
+  
+    enum FileType {
+        case directory
+        case regularFile
+        case other
+    }
+
+    func fetchFileType() throws -> FileType {
+        let values = try self.resourceValues(forKeys: [.isDirectoryKey, .isRegularFileKey])
+
+        if values.isDirectory == true {
+            return .directory
+        }
+        if values.isRegularFile == true {
+            return .regularFile
+        }
+        if self.hasDirectoryPath {
+            return .directory
+        }
+        return .other
+    }
+    
+    func getRelativePathComponents(
+        to toFolder: URL,      // URL A
+    ) throws -> [String] {
+        // 1) Get path components of A’s directory
+        let aDirComponents = toFolder.pathComponents
+        // 2) Get path components of B
+        let bComponents = self.pathComponents
+        
+        // Ensure B is actually a prefix of A’s directory
+        guard bComponents.count <= aDirComponents.count,
+              aDirComponents[0..<bComponents.count] == bComponents[0..<bComponents.count]
+        else {
+            // B is not a parent of A’s directory; just return destFolder
+            throw AppError("Url \(self.absoluteString) is not a relative path to \(toFolder.absoluteString)")
+        }
+        
+        // 3) Compute the “relative” components from B to A’s directory
+        let relativeComponents = Array(aDirComponents[bComponents.count...])
+        return relativeComponents
+    }
+    
+    func appendRelativePath(
+        from fromFolder: URL,      // URL A
+        base baseFolder: URL   // URL B
+    ) throws -> URL {
+        let relativeComponents = try baseFolder.getRelativePathComponents(to: fromFolder)
+        
+        // 4) Append them one by one onto C
+        var result = self
+        for comp in relativeComponents {
+            result.appendPathComponent(comp)
+        }
+        
+        return result
+    }
+}