docs: sync intro/teaser text from docs to readme

9 jobs for fix_readme in 8 minutes and 2 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build Docker
passed #725626
build_docker_from_cache

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  Test
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test_mpi

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test_serial

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  Demo Runs
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run_bernoulli

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run_curve_fitting

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run_getting_started_1

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run_getting_started_2

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run_getting_started_3

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run_ipynb

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