branch

• feature/add-404-page
• feature/add-qutip-virtual-lab
• feature/add-try-qutip
• feature/deprecate-docs-folder
• feature/fix-qutip-virtual-lab-formatting
• feature/instructions-to-build-locally
• feature/replace-html-with-md
• feature/updates-for-v5-release
• fix/typo-in-qutip-virtual-lab
• master
• nathanshammah-patch-1
• update_documentation

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