Add weekly build workflow to ensure regular builds even during quiet periods #1069

Job	Run time
Tests (windows-latest, x86_64-pc-windows-msvc, yes)	6m 57s
Env Tests (ci-poetry-project, ubuntu-latest, x86_64-unknown-linux-musl)	2m 8s
Tests (macos-14, aarch64-apple-darwin, yes)	12m 4s
Env Tests (ci-poetry-custom, ubuntu-latest, x86_64-unknown-linux-musl)	2m 19s
Env Tests (ci-poetry-custom, windows-latest, x86_64-pc-windows-msvc)	4m 20s
Builds (windows-latest, x86_64-pc-windows-msvc)	3m 20s
Env Tests (ci-poetry-project, windows-latest, x86_64-pc-windows-msvc)	6m 40s
Tests in Containers (ci-homebrew-container, ubuntu-latest, homebrew/brew, x86_64-unknown-linux-musl)	3m 26s
Tests in Containers (ci-jupyter-container, ubuntu-latest, mcr.microsoft.com/devcontainers/univers...	4m 25s
Builds (ubuntu-latest, x86_64-unknown-linux-musl, yes)	2m 1s
Builds (macos-14, aarch64-apple-darwin, yes)	2m 28s
Builds (windows-latest, aarch64-pc-windows-msvc)	3m 38s
Tests (macos-latest, x86_64-apple-darwin, yes)	13m 16s
Tests (ubuntu-latest, x86_64-unknown-linux-musl, yes)	8m 28s
Env Tests (ci-poetry-global, windows-latest, x86_64-pc-windows-msvc)	4m 21s
Builds (macos-latest, x86_64-apple-darwin, yes)	1m 48s
Env Tests (ci-poetry-global, ubuntu-latest, x86_64-unknown-linux-musl)	2m 39s
	1h 24m 18s

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