Fix release generation issues (#3898)

# Description of Changes

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Please provide a summary of the changes, including:

- What was changed
- Why the change was made
- Any challenges encountered

Closes #(issue_number)
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---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

build.gradle

@@ -78,6 +78,10 @@ tasks.register('writeVersion') {
     }
 }
 
+tasks.named('createExe') {
+    dependsOn(":stirling-pdf:bootJar")
+}
+
 subprojects {
     apply plugin: 'java'
     apply plugin: 'java-library'
@@ -90,9 +94,11 @@ subprojects {
         sourceCompatibility = JavaVersion.VERSION_17
     }
 
-    bootJar {
-        enabled = false
-    }
+     if (project.name != "stirling-pdf") {
+        bootJar {
+            enabled = false
+        }
+     }
 
     repositories {
         mavenCentral()
@@ -202,6 +208,7 @@ static def getMacVersion(String version) {
 }
 
 jpackage {
+    dependsOn(":stirling-pdf:bootJar")
     input = layout.projectDirectory.dir("stirling-pdf/build/libs")
     destination = layout.projectDirectory.dir("build/jpackage")
     mainJar = "Stirling-PDF-${project.version}.jar"
@@ -445,7 +452,7 @@ launch4j {
     } else {
         headerType = "console"
     }
-    jarTask = tasks.bootJar
+    jarTask = project(":stirling-pdf").tasks.bootJar
 
     errTitle="Encountered error, do you have Java 21?"
     downloadUrl="https://download.oracle.com/java/21/latest/jdk-21_windows-x64_bin.exe"