Move vscode to being a tool

Previously this was in the main schema

Author: nc6

.envrc

@@ -0,0 +1 @@
+use flake

examples/vscode-exts/project.ncl

@@ -26,3 +26,4 @@ let organist = inputs.organist in
   },
 }
   | organist.OrganistExpression
+  & organist.tools.vscode.Schema

lib/organist.ncl

@@ -9,6 +9,7 @@
 
   tools.editorconfig = import "./editorconfig.ncl",
   tools.direnv = import "./direnv.ncl",
+  tools.vscode = import "./vscode.ncl",
 }
 #TODO: currently, Nickel forbids doc at the toplevel. It's most definitely
 # temporary, as the implementation of RFC005 is ongoing. Once the capability is

lib/schema.ncl

@@ -65,5 +65,4 @@ let vscode = import "vscode.ncl" in
         = {},
     }
     & filegen.Schema
-    & vscode.Schema
 }