Add doc generation scripts #91

Job	Run time
prepare	7s
build / Generate matrix	23s
build / Windows (windows_amd64, x64-windows-static-md)	18m 25s
build / Linux (linux_amd64, ubuntu:18.04, x64-linux)	16m 56s
build / Windows (windows_amd64_rtools, x64-mingw-static)	37m 56s
build / MacOS (osx_amd64, x86_64, x64-osx)	2m 12s
build / MacOS (osx_arm64, arm64, arm64-osx)	1m 54s
build / DuckDB-Wasm (wasm_mvp, wasm32-emscripten)	1m 41s
build / Linux (linux_amd64_gcc4, quay.io/pypa/manylinux2014_x86_64, x64-linux)	14m 33s
build / DuckDB-Wasm (wasm_eh, wasm32-emscripten)	1m 49s
build / Linux (linux_arm64, ubuntu:18.04, arm64-linux)	18m 50s
build / DuckDB-Wasm (wasm_threads, wasm32-emscripten)	1m 42s
deploy	0s
docs	0s
	1h 56m 28s

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