feat: slimevr section with some info

content/docs/slimevr/_index.md

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+---
+title: SlimeVR
+weight: 250
+---
+
+# SlimeVR
+
+- [SlimeVR Documentation](https://docs.slimevr.dev/)
+
+> SlimeVR is a set of open hardware sensors and open source software that facilitates full-body tracking (FBT) in virtual reality. 
+
+SlimeVR is an open source IMU based full body tracking system. Being open source it has Linux support and there are a few variants you can either buy or build yourself.
+
+You can pre-order the official SlimeVR trackers from [their crowdsupply page](https://www.crowdsupply.com/slimevr/slimevr-full-body-tracker), but at the time of writing this if you order them right now you'd need to wait approximately 4 months for your orders to ship, due to how cheap and popular they are compared to other solutions.
+
+## Building
+
+Alternatively you can build it on your own, and you have a few variants to choose from:
+
+- [Official SlimeVR DIY builders guide](https://docs.slimevr.dev/diy/index.html)
+- [Frozen Slimes V2](https://github.com/frosty6742/frozen-slimes-v2)
+  - while a bit bigger, Frozen Slimes V2 tend to be cheaper and a lot easier to build, being approachable even for people that are inexperienced with soldering
+
+## SlimeVR app
+
+<!-- will likely need to move this somewhere else -->
+
+- [SlimeVR on Linux guide](https://docs.slimevr.dev/tools/linux-installation.html)
+- [Flathub](https://flathub.org/apps/dev.slimevr.SlimeVR)