Move Reflection to scala.quoted

In theory it should be inside of the QuoteContext but this is blocked by scala#10253.
We take this first step to cleanup the `scala.tasty` package

Author: nicolasstucki

compiler/src/dotty/tools/dotc/quoted/QuoteContextImpl.scala

@@ -79,7 +79,7 @@ class QuoteContextImpl private (ctx: Context) extends QuoteContext, QuoteUnpickl
     }
   end extension
 
-  object reflect extends scala.tasty.Reflection:
+  object reflect extends scala.quoted.Reflection:
 
     def rootContext: Context = ctx
 

library/src/scala/quoted/QuoteContext.scala

@@ -66,7 +66,8 @@ trait QuoteContext { self: internal.QuoteUnpickler & internal.QuoteMatching =>
   /** Low-level Typed AST API metaprogramming API.
    *  This API does not have the static type guarantiees that `Expr` and `Type` provide.
    */
-  val reflect: scala.tasty.Reflection
+  val reflect: scala.quoted.Reflection
+  // TODO move Reflcetion definition in here
 
   /** Type of a QuoteContext provided by a splice within a quote that took this context.
    *  It is only required if working with the reflection API.

library/src/scala/tasty/Reflection.scala renamed to library/src/scala/quoted/Reflection.scala

@@ -1,8 +1,8 @@
-package scala.tasty
+package scala.quoted
 
 import scala.tasty.reflect._
 
-/** TASTy Reflect Interface.
+/** AST reflection interface.
  *
  *  Provides all functionality related with AST based metaprogramming.
  *

tests/neg-macros/i6324.scala

@@ -1,5 +1,5 @@
 class Test {
-  def res(x: quoted.Expr[Int])(using tasty.Reflection): quoted.Expr[Int] = x match {
+  def res(x: quoted.Expr[Int])(using quoted.Reflection): quoted.Expr[Int] = x match {
     case '{ 1 + $b } => // error: Type must be fully defined. Consider annotating the splice using a type ascription: (${b}: XYZ).
       b // error: Not found: b
   }

tests/neg-macros/i6325.scala

@@ -1,5 +1,5 @@
 object Test {
-  def res(x: quoted.Expr[Int])(using tasty.Reflection): quoted.Expr[Int] = x match {
+  def res(x: quoted.Expr[Int])(using quoted.Reflection): quoted.Expr[Int] = x match {
     case '{ 1 + (${Bind(b)}: Int) } => ??? // error: Not found: Bind
     case _ => ???
   }