Update MariaDB documentation to current state

Update RStudio installation instructions

Update Arduino IDE installation and documentation to use Arduino IDE v2

monodevelop upstream has been discontinued, and monodevelop has been retired from Fedora 43

Update nodejs.md

Adjust multiple Pythons to the current Python offer in Fedora

Update the commands to work with new esptool, keep compatibility

Remove pipenv page

Update swift_installation.md

Add Go 1.25 information

Update go-installation.md

Fix minor typo in nodejs doc (#554)

Fixes Flathub app link 404 error (#553)

Update Python versions and remove old notice (#552)

Update .NET docs, replacing .NET 6 with .NET 9 (#550)