move removed lectures, create new ones.

_quarto.yml

lectures/coding-environment-reproducibility/slides.qmd

lectures/error-handling-observability/slides.qmd

lectures/refactoring/slides.qmd

lectures/tooling-ci/slides.qmd

old_lectures/file-and-data-systems/slides.qmd

...and-data-systems/static/gmd-13-3607-2020-f05-high-res.pdf

...and-data-systems/static/gmd-13-3607-2020-f05-high-res.png

...ectures/file-and-data-systems/static/network-overview.png

old_lectures/file-and-data-systems/static/storage-media.jpg

old_lectures/file-and-data-systems/timer.ipynb

old_lectures/hardware/slides.qmd

old_lectures/hardware/static/HPC_schematic2.png

old_lectures/hardware/static/HPC_schematic_1.png

old_lectures/hardware/static/a100.png

old_lectures/hardware/static/amd-milan.png

old_lectures/hardware/static/history.svg

old_lectures/hardware/static/node_schematic.png

old_lectures/hardware/static/reduce.svg

old_lectures/hardware/static/stencil_operations_1.jpg