feat: enable loading from local storage

[optimalcharb]

Currently PDFs are rendered by URL only. [1] Test pdf-container/plugin-loader-2 functionality to see if it can support loading from local storage [2] if not, fix the BufferStrategy in the copy of plugin-loader to load PDFs from local storage. refer to @embedpdf/core and @embedpdf/engines, especially usePdfium for ideas.

[optimalcharb]

@embedpdf/plugin-loader v2.0.0 should have this capability fixed. need to wait for release and then test