Added updated plugin version of Fan Speed Slider Plugin (#1298)

* Added updated plugin version of Fan Speed Slider Plugin

Author: mival

_plugins/fanspeedslider.md

@@ -0,0 +1,34 @@
+---
+layout: plugin
+id: fanspeedslider
+title: Fan Speed Control
+description: Adds fan speed control buttons to Control tab -> General
+archive: https://github.com/mival/OctoPrint-FanSpeedSlider/archive/main.zip
+homepage: https://github.com/mival/OctoPrint-FanSpeedSlider
+source: https://github.com/mival/OctoPrint-FanSpeedSlider
+authors:
+- mival
+- jneilliii
+- czM1K3
+- ntoff
+license: AGPLv3
+date: 2024-05-28
+tags:
+- fan
+- speed
+- M106
+- M107
+- controls
+screenshots:
+- url: /assets/img/plugins/fanspeedslider/fanspeedslider.jpg
+  alt: Preview
+compatibility:
+  os:
+  - posix
+  - windows
+  python: ">=3,<4"
+---
+
+Pluging is updated version of <https://github.com/ntoff/OctoPrint-FanSpeedSlider> and added +/- controls from https://github.com/czM1K3/OctoPrint-FanSpeedSlider
+
+See <https://github.com/mival/OctoPrint-FanSpeedSlider> for information on usage.