Broken Links in Intro Document

[baffo32]

Navigation:

• openuc2.com -> github icon -> openuc2.github.io front page
• “Visit the openUC2 Tutorials” -> https://openuc2.github.io/docs/intro
• Scroll down to topics and descriptions
• Geometrical Optics [EN] link broken https://openuc2.github.io/docs/Toolboxes/DiscoveryCore/GERMAN/uc2miniboxEN
• Microscopy [EN] links to German page https://openuc2.github.io/docs/Toolboxes/DiscoveryCore/GERMAN/uc2miniboxDE
• Telescope [EN] [DE] both links are broken https://openuc2.github.io/docs/02_Toolboxes/01_CoreBox/ENGLISH/03_core_telescope.md https://openuc2.github.io/docs/02_Toolboxes/01_CoreBox/GERMAN/03_core_telescope.md
• ImSwitch link is broken https://openuc2.github.io/docs/05_ImSwitch/01_Quickstart.md

Additionally the link at the top of the page to https://github.com/openUC2/UC2-GIT/issues links to an archived repository.