Dynamic paths for tools and removal of unused book endpoints (#3018)

# Description of Changes

This pull request includes several changes primarily focused on
improving configuration management, removing deprecated methods, and
updating paths for external dependencies. The most important changes are
summarized below:

### Configuration Management Improvements:
* Added a new `RuntimePathConfig` class to manage dynamic paths for
operations and pipeline configurations
(`src/main/java/stirling/software/SPDF/config/RuntimePathConfig.java`).
* Removed the `bookAndHtmlFormatsInstalled` bean and its associated
logic from `AppConfig` and `EndpointConfiguration`
(`src/main/java/stirling/software/SPDF/config/AppConfig.java`,
`src/main/java/stirling/software/SPDF/config/EndpointConfiguration.java`).
[[1]](diffhunk://#diff-4d774ec79aa55750c0a4739bee971b68877078b73654e863fd40ee924347e143L130-L138)
[[2]](diffhunk://#diff-750f31f6ecbd64b025567108a33775cad339e835a04360affff82a09410b697dL12-L35)
[[3]](diffhunk://#diff-750f31f6ecbd64b025567108a33775cad339e835a04360affff82a09410b697dL275-L280)

### External Dependency Path Updates:
* Updated paths for `weasyprint` and `unoconvert` in
`ExternalAppDepConfig` to use values from `RuntimePathConfig`
(`src/main/java/stirling/software/SPDF/config/ExternalAppDepConfig.java`).
[[1]](diffhunk://#diff-c47af298c07c2622aa98b038b78822c56bdb002de71081e102d344794e7832a6R12-L33)
[[2]](diffhunk://#diff-c47af298c07c2622aa98b038b78822c56bdb002de71081e102d344794e7832a6L104-R115)


### Minor Adjustments:
* Corrected a typo from "Unoconv" to "Unoconvert" in
`EndpointConfiguration`
(`src/main/java/stirling/software/SPDF/config/EndpointConfiguration.java`).

---

## 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/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/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/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/DeveloperGuide.md#6-testing)
for more details.

src/main/resources/settings.yml.template

@@ -96,6 +96,15 @@ system:
     hostName: localhost # the host name to use for the database url. Set to 'localhost' when running the app locally. Set to match the name of the container name of your database container when running the app on a server (Docker configuration)
     port: 5432 # set the port number of the database. Ensure this matches the port the database is listening to
     name: postgres # set the name of your database. Should match the name of the database you create
+  customPaths:
+    pipeline:
+      watchedFoldersDir: "" #Defaults to /pipeline/watchedFolders
+      finishedFoldersDir: "" #Defaults to /pipeline/finishedFolders
+    operations:
+      weasyprint: "" #Defaults to /opt/venv/bin/weasyprint
+      unoconvert: "" #Defaults to /opt/venv/bin/unoconvert
+
+
 
 ui:
   appName: '' # application's visible name