.EML to PDF File Conversion

Title of ticket:

#### Description
The purpose of this task is to convert .EML Files and its attachments arriving into Ministry Level S3 Bucket's request folder , to a "PROPERLY FORMATTED, ALIGNED" PDF file. We can refer the code base from File Watcher and create a Module for MSG/EML to PDF to plugin with a centralized .NET core microservices(#2975), which is intended to run on Linux based Docker container, in turn with our BC GOV OCP

#### Dependencies
Are there any dependencies?

#### DOD
- [x] Create a independent .NET core class library for .EML (from S3) and attachments to PDF conversion (saved back to S3)- refer File Conversion Library.
- [x] Fetch the content of ,EML and .MSG - in format of PDF - follow details of ICAL
- [ ] Create Unit Test for .MSG,.EML to PDF
- [ ] Integrated with Main FOI DOC Conversion Microservice/computing service
- [ ] Tested with Docker

Start by reviewing the File Watcher, File Conversion Library, and centralized .NET Core microservices referenced in the issue, including issue #2975 and the ICAL details. Determine how the independent EML/MSG conversion library reads from and writes to S3, then add the missing unit tests and verify integration and Docker operation. Done means the listed unit, integration, and Docker checks pass.

Written by the indexing model from the issue text.