Lots of changes (#70)

Image extraction and conversion to formats 

Multi parallel file execution for all forms so you can input multiple files quickly 

Any file at all pdf using libreoffice, super powerful
Sadly makes docker image larger but worth it 

OCR PDF using ocr my pdf
Works awesomely for adding text to a image

Improved compression using ocr my pdf app

Settings page with custom download options such as 
- open in same window
- open in new window
- download
- download as zip

Update detection in settings page it should show notification if there is a update (very hidden)

UI cleanups

Add other image formats to PDF to Image

Various fies to icons, and pdf.js usage

src/main/java/stirling/software/SPDF/utils/ProcessExecutor.java

@@ -0,0 +1,69 @@
+package stirling.software.SPDF.utils;
+
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.util.Arrays;
+import java.util.List;
+import java.io.BufferedReader;
+import java.util.ArrayList;
+public class ProcessExecutor {
+	public static int runCommandWithOutputHandling(List<String> command) throws IOException, InterruptedException {
+	    ProcessBuilder processBuilder = new ProcessBuilder(command);
+	    Process process = processBuilder.start();
+
+	    // Read the error stream and standard output stream concurrently
+	    List<String> errorLines = new ArrayList<>();
+	    List<String> outputLines = new ArrayList<>();
+
+	    Thread errorReaderThread = new Thread(() -> {
+	        try (BufferedReader errorReader = new BufferedReader(new InputStreamReader(process.getErrorStream(), StandardCharsets.UTF_8))) {
+	            String line;
+	            while ((line = errorReader.readLine()) != null) {
+	                errorLines.add(line);
+	            }
+	        } catch (IOException e) {
+	            e.printStackTrace();
+	        }
+	    });
+
+	    Thread outputReaderThread = new Thread(() -> {
+	        try (BufferedReader outputReader = new BufferedReader(new InputStreamReader(process.getInputStream(), StandardCharsets.UTF_8))) {
+	            String line;
+	            while ((line = outputReader.readLine()) != null) {
+	                outputLines.add(line);
+	            }
+	        } catch (IOException e) {
+	            e.printStackTrace();
+	        }
+	    });
+
+	    errorReaderThread.start();
+	    outputReaderThread.start();
+
+	    // Wait for the conversion process to complete
+	    int exitCode = process.waitFor();
+
+	    // Wait for the reader threads to finish
+	    errorReaderThread.join();
+	    outputReaderThread.join();
+
+	    if (outputLines.size() > 0) {
+	        String outputMessage = String.join("\n", outputLines);
+	        System.out.println("Command output:\n" + outputMessage);
+	    }
+
+	    if (errorLines.size() > 0) {
+	        String errorMessage = String.join("\n", errorLines);
+	        System.out.println("Command error output:\n" + errorMessage);
+	        if (exitCode != 0) {
+	            throw new IOException("Command process failed with exit code " + exitCode + ". Error message: " + errorMessage);
+	        }
+	    }
+
+	    return exitCode;
+	}
+   		
+	    		
+}