Implement type command (#19944)

* Implement type command

- this will be mapped to textDocument/typeDefinition in LSP protocol. It will be
very useful for `nim` in particular because typically most of the time the type
is inferred.

* Update nimsuggest/nimsuggest.nim

Co-authored-by: Andreas Rumpf <rumpf_a@web.de>

compiler/options.nim

@@ -192,7 +192,7 @@ type
   IdeCmd* = enum
     ideNone, ideSug, ideCon, ideDef, ideUse, ideDus, ideChk, ideChkFile, ideMod,
     ideHighlight, ideOutline, ideKnown, ideMsg, ideProject, ideGlobalSymbols,
-    ideRecompile, ideChanged
+    ideRecompile, ideChanged, ideType
 
   Feature* = enum  ## experimental features; DO NOT RENAME THESE!
     implicitDeref,
@@ -1006,6 +1006,7 @@ proc parseIdeCmd*(s: string): IdeCmd =
   of "globalSymbols": ideGlobalSymbols
   of "recompile": ideRecompile
   of "changed": ideChanged
+  of "type": ideType
   else: ideNone
 
 proc `$`*(c: IdeCmd): string =
@@ -1027,6 +1028,7 @@ proc `$`*(c: IdeCmd): string =
   of ideGlobalSymbols: "globalSymbols"
   of ideRecompile: "recompile"
   of ideChanged: "changed"
+  of ideType: "type"
 
 proc floatInt64Align*(conf: ConfigRef): int16 =
   ## Returns either 4 or 8 depending on reasons.