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Add optional orjson support for faster json reading and writing (#2854)

* initial orjson support, for hextuples parser and serializer, and first stages of json-ld parser.
This relies on merging of the BytesIOWrapper PR.

* Finish work bringing orjson to JSON-LD Graph Parser
Add orjson to sparql-results-json parser, and sparql-results-json serializer
Tangential fixes to all the other non-json SPARQL-Results serializers
Adding better typing to all SPARQL-Results Serializers.
Got 7 ignored tests passing for SPARQL-Results Serializers.

* If its known, get FileInputSource encoding from the source itself for JSON-LD Parser.

* Fix MyPy complaint in JSON-LD parser caused by reusing a variable name after it already has a type associated.

* Add orjson support to the newly merged HTMLJSONParser.

* MyPy typing fixes, Black Fixes, and Ruff linting fixes for orjson branch after resolving recent merge conflicts.

* Add missing updated poetry.lock lockfile that is supposed to accompany the `orjson` pyproject addition.

* The linter ignore-assignment-type suppressions aren't used when orjson is not installed throwing a mypy error, but they are needed when orjson is installed to prevent different mypy errors. So add additional unused-ignore suppressions.

* Change internal usages of json serializer indent to 2, so that orjson and stdlib json outputs are the same for docs and comparison purposes.

* Apply Black formatting to the test/ dir too.

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