chore: migrate Docker Hub to bentopdfteam, add Podman/Quadlet support

- Migrate Docker Hub account from bentopdf to bentopdfteam
- Make GHCR the recommended container registry
- Add Podman and Podman Compose support
- Add Podman Quadlet (systemd) documentation
- Add Table of Contents to README

unraid_bentopdf.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0"?>
 <Container version="2">
   <Name>bentopdf</Name>
-  <Repository>bentopdf/bentopdf</Repository>
-  <Registry>https://hub.docker.com/r/bentopdf/bentopdf/</Registry>
+  <Repository>bentopdfteam/bentopdf</Repository>
+  <Registry>https://hub.docker.com/r/bentopdfteam/bentopdf/</Registry>
   <Network>bridge</Network>
   <MyIP/>
   <Shell>sh</Shell>
@@ -12,7 +12,7 @@
   <Overview>Uploaded on behalf of creator: alam00000&#13;
 BentoPDF is a privacy first PDF Toolkit&#13;
 &#13;
-https://hub.docker.com/r/bentopdf/bentopdf/</Overview>
+https://hub.docker.com/r/bentopdfteam/bentopdf/</Overview>
   <Category>Tools:</Category>
   <WebUI>http://[IP]:[PORT:8080]/</WebUI>
   <TemplateURL/>