add investigation tool usage (#14)

* add investigation tool usage

[11:23:43] +Dumcord: <_​p3t3_> Hey, I was looking for some help, I know you can do /claimslist <player name> but im a bit confused is there a way to tell who owns a claim like the one im stood in now as admin as I cant see a way to tell that in the documentation ?
[11:24:06] @RoboMWM: hmmm documentation I wonder how to improve
[11:24:12] @RoboMWM: cuz yes there is
[11:24:23] @RoboMWM: use inspect tool, default stick
[11:24:52] @RoboMWM: I'm curious though where you looked and what search terms you may have tried
[11:25:42] +Dumcord: <_​p3t3_> looked here and read down all the headdings https://docs.griefprevention.com/administrators_guide/#investigating-a-players-claims
[11:26:17] @RoboMWM: ah thank you I'll add to that
[11:26:30] @RoboMWM: yea only mention of investigation tool is in setup+configuration
[11:26:38] @RoboMWM: I guess it's also in the video 
[11:27:47] +Dumcord: <_​p3t3_> great thank you 🙂 i'll go try it ... i originally looked in https://docs.griefprevention.com/commands/ but couldnt find it so checkled the admin guide and didnt see it there either but ty .... oh im not a fan of video's sorry dont think i watched it all i skipped through it

* sneak+shift

Author: RoboMWM

administrators_guide.md

@@ -68,6 +68,9 @@ Required Permission: `griefprevention.claimslistother`
 
 The `/claimslist <player name>` command will list all of a player's claims along with their sizes and locations, and summarize the claim block math for you.
 
+## Investigating a specific claim
+
+Equip the investigation tool (stick by default), and right click the claimed area. You can also right click while sneaking to show nearby claims.
 
 ## Fighting Wilderness Grief (World Repair)