feat(outputters): Expose writing of PDF resources to Lua #2308
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This commit extends the low-level C wrapper to libtexpdf to let Lua code add page resources directly to the PDF. This makes it possible to prototype extensions to the Lua outputter without recompiling SILE, and opens the door to features such as gradient support.
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(It's the minimal C part of #2251)
This commit extends the low-level C wrapper to libtexpdf to let Lua code add page resources directly to the PDF. This makes it possible to prototype extensions to the Lua outputter without recompiling SILE, and opens the door to features such as gradient support.