added reviung34, made gtips folder and moved all reviung boards into said folder

boards/gtips/reviung39/README.md

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+# Reviung39
+
+![Reviung39](https://boardsource.imgix.net/d6215164-6100-4b72-b355-1a67b7704463.jpg?raw=true)
+
+Reviung39 is a 39 key keyboard designed by gtips. The Reviung39 sits somewhere
+between an Atreus and a Corne, you get some nice ergonomic benefits based on its
+quasi-split design and since a true split keyboard isn't for everyone, this is
+an awesome middle ground. I find this keyboard extremely comfortable to use.
+
+kb.py is designed to work with the nice!nano
+
+Hardware Availability: [PCB & Case Data](https://github.com/gtips/reviung)  
+
+Retailers (USA)  
+[Boardsource](https://boardsource.xyz/store/5ecb734486879c9a0c22dab3)  
+
+Extensions enabled by default  
+- [Layers](/docs/en/layers.md) Need more keys than switches? Use layers.
+- [RGB](/docs/en/rgb.md) Light it up
+- [ModTap](/docs/en/modtap.md) Allows mod keys to act as different keys when tapped.
+
+Common Extensions
+- [Power](/docs/en/power.md) Powersaving features for battery life
+
+## Microcontroller support
+
+Update this line in `kb.py` to any supported microcontroller in `kmk/quickpin/pro_micro`:
+
+```python
+from kmk.quickpin.pro_micro.boardsource_blok import pinout as pins
+```