Throw - dont panic for when Typst tries to access non virtual files

Author: Sajjon

crates/render-pdf/src/typst_context/context.rs

@@ -8,6 +8,8 @@ use getset::Getters;
 use log::trace;
 use typst::{
     Library, World,
+    diag::FileError,
+    ecow::EcoString,
     foundations::{Bytes, Datetime},
     syntax::{FileId, Source},
     text::{Font, FontBook},
@@ -73,8 +75,11 @@ impl World for TypstContext {
         }
     }
 
-    fn file(&self, _id: FileId) -> typst::diag::FileResult<Bytes> {
-        panic!("File access not implemented in this minimal example")
+    fn file(&self, id: FileId) -> typst::diag::FileResult<Bytes> {
+        Err(FileError::Other(Some(EcoString::inline(&format!(
+            "Non-virtual: {:?}",
+            id
+        )))))
     }
 
     fn font(&self, index: usize) -> Option<Font> {