Add MSG to EML email conversion support (#367)

- Add new msgconvert converter using libemail-outlook-message-perl
- Support conversion from Outlook MSG files to standard EML format
- Add msgconvert to Docker dependencies and version checking
- Register msgconvert converter in main converter registry

Implements feature request #367 for email format conversion

src/helpers/printVersions.ts

@@ -154,6 +154,16 @@ if (process.env.NODE_ENV === "production") {
     }
   });
 
+  exec("msgconvert --version", (error, stdout) => {
+    if (error) {
+      console.error("msgconvert (libemail-outlook-message-perl) is not installed");
+    }
+
+    if (stdout) {
+      console.log(stdout.split("\n")[0]);
+    }
+  });
+
   exec("bun -v", (error, stdout) => {
     if (error) {
       console.error("Bun is not installed. wait what");