refactor(core): simplify filesystem read protocol (#31058)

packages/core/test/tool-grep.test.ts

@@ -32,11 +32,7 @@ const filesystem = Layer.succeed(
   FileSystem.Service.of({
     read: () => Effect.die("unused"),
     resolveReadPath: () => Effect.die("unused"),
-    resolveRead: () => Effect.die("unused"),
-    readResolved: () => Effect.die("unused"),
-    readSampleResolved: () => Effect.die("unused"),
-    readTextPageResolved: () => Effect.die("unused"),
-    readToolResolved: () => Effect.die("unused"),
+    readTool: () => Effect.die("unused"),
     list: () => Effect.die("unused"),
     resolveRoot: (input = {}) =>
       Effect.succeed(