STY: add pandas._typing to the known_pre_core block for isort
closes #27534

Did you run isort after this change?  I expect imports will be shuffled No i didn't run isort after the change You’ll need to do that in order to get the CI to pass hmm may need to put this on hold while the dependencies in pandas._typing get resolved.  ATM it isn't strictly correct to call it pre-core the error i am getting is [here](https://dev.azure.com/pandas-dev/pandas/_build/results?buildId=14940&view=logs&jobId=435ca956-9126-505f-566f-fff31072e2ba&taskId=e3717827-2a2f-5148-8ad4-7900d2171f6e&lineStart=36&lineEnd=38&colStart=1&colEnd=1)
 It looks like isort is failing on `pandas/io/formats/formats.py` but then I tried running isort on that file on my local system it seems to pass the test. How are you running this locally? It does appear that _typing is after core in that module so failure seems legit @WillAyd I first ran `isort --recursive --check-only pandas` and then after seeing failing import on `formats.py`, I ran `isort pandas/io/fomats/formats.py`. @sameshl can you merge master? @WillAyd Do you want me to merge master into my branch? Isn't rebasing a better option? Sorry for late reply as I've been on vacation for the past few weeks but yes we typically merge master instead of rebasing pls merge master (you can rebase if you want, but merging is simpler); we squash on final merge anyways so it doesn't mater. ping on green. closing as stale, if you want to continue, pls ping (and merge master)