Include bitmap images in PDF plots, preview, and printing

Include decoded IMAGE/OLE content in the shared PDF plotting path,
with clipping, transforms, transparency, draw order, and resource reuse.
Use named page content for export and printing.

Fixes #1266

Cargo.toml

@@ -85,7 +85,7 @@ meshopt = "0.6.2"
 i18n-embed = { version = "0.16", features = ["desktop-requester"] }
 rayon = "1"
 open = "5"
-printpdf = { version = "0.9.1", default-features = false }
+printpdf = { version = "0.9.1", default-features = false, features = ["images"] }
 ureq = { version = "3", default-features = false, features = ["rustls", "platform-verifier", "win-system-proxy"] }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]