Move AST files into ast folder

ql/consistency-queries/VariablesConsistency.ql

@@ -1,4 +1,4 @@
-import codeql_ruby.Variable
+import codeql_ruby.ast.Variable
 
 query predicate ambiguousVariable(VariableAccess access, Variable variable) {
   access.getVariable() = variable and

ql/src/codeql_ruby/AST.qll

@@ -1,6 +1,6 @@
 import codeql.Locations
-import codeql_ruby.Method
-import codeql_ruby.Parameter
+import codeql_ruby.ast.Method
+import codeql_ruby.ast.Parameter
 private import codeql_ruby.Generated
 
 /**

ql/src/codeql_ruby/ast/Variable.qll

@@ -1,6 +1,6 @@
 /** Provides classes for modeling program variables. */
 
-private import Generated::Generated
+private import codeql_ruby.Generated::Generated
 private import codeql.Locations
 
 private AstNode parent(AstNode n) {

ql/test/library-tests/variables/parameter.ql

@@ -1,4 +1,4 @@
-import codeql_ruby.Variable
+import codeql_ruby.ast.Variable
 
 query predicate parameter(Parameter p, Variable v) { p.getAnAccess().getVariable() = v }
 

ql/test/library-tests/variables/varaccess.ql

@@ -1,4 +1,4 @@
-import codeql_ruby.Variable
+import codeql_ruby.ast.Variable
 
 query predicate variableAccess(VariableAccess access, Variable variable, VariableScope scope) {
   variable = access.getVariable() and

ql/test/library-tests/variables/variable.ql

@@ -1,4 +1,4 @@
-import codeql_ruby.Variable
+import codeql_ruby.ast.Variable
 
 query predicate variable(Variable v) { any() }
 

ql/test/library-tests/variables/varscopes.ql

@@ -1,3 +1,3 @@
-import codeql_ruby.Variable
+import codeql_ruby.ast.Variable
 
 select any(VariableScope x)