Created useful info section

Made a useful info section to contain things like good suppliers etc

docs/Useful-Information/Good-Suppliers.md

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+# Trusted Suppliers of parts
+
+This page contains information on suppliers that users of FOME have purchased items from and had good results. 
+
+Deutsche connectors -  https://www.aliexpress.com/store/1101257717

docs/Useful-Information/_category_.json

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+{
+  "label": "Additional Information",
+  "position": 99,
+  "link": {
+    "type": "generated-index",
+    "description": "Some lists and links to useful information"
+  }
+}