[TS/JS] Move TS tests to dedicated folder and deps upgrade (#7508)

* Move TS tests to dedicated folder and deps upgrade

* Attempt to fix generate_code

* Fix dir on CI

* Add js extension

* Fix missing extension

* Harmonize with test gen

* Unexplained code gen change

* Restore yarn.lock

* Naive attempt to fix bazel stuff

* Pin @bazel/typescript to 5.2.0

* Attempt to fix bazel

* More tweak

* Upgrade deps

* Tweak?

* Fix path

* Fix test package

Co-authored-by: Derek Bailey <derekbailey@google.com>

tests/ts/my-game/example/referrable.ts

@@ -0,0 +1,95 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+
+
+export class Referrable {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):Referrable {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsReferrable(bb:flatbuffers.ByteBuffer, obj?:Referrable):Referrable {
+  return (obj || new Referrable()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsReferrable(bb:flatbuffers.ByteBuffer, obj?:Referrable):Referrable {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new Referrable()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+id():bigint {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? this.bb!.readUint64(this.bb_pos + offset) : BigInt('0');
+}
+
+mutate_id(value:bigint):boolean {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+
+  if (offset === 0) {
+    return false;
+  }
+
+  this.bb!.writeUint64(this.bb_pos + offset, value);
+  return true;
+}
+
+static getFullyQualifiedName():string {
+  return 'MyGame_Example_Referrable';
+}
+
+static startReferrable(builder:flatbuffers.Builder) {
+  builder.startObject(1);
+}
+
+static addId(builder:flatbuffers.Builder, id:bigint) {
+  builder.addFieldInt64(0, id, BigInt('0'));
+}
+
+static endReferrable(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  return offset;
+}
+
+static createReferrable(builder:flatbuffers.Builder, id:bigint):flatbuffers.Offset {
+  Referrable.startReferrable(builder);
+  Referrable.addId(builder, id);
+  return Referrable.endReferrable(builder);
+}
+
+serialize():Uint8Array {
+  return this.bb!.bytes();
+}
+
+static deserialize(buffer: Uint8Array):Referrable {
+  return Referrable.getRootAsReferrable(new flatbuffers.ByteBuffer(buffer))
+}
+
+unpack(): ReferrableT {
+  return new ReferrableT(
+    this.id()
+  );
+}
+
+
+unpackTo(_o: ReferrableT): void {
+  _o.id = this.id();
+}
+}
+
+export class ReferrableT {
+constructor(
+  public id: bigint = BigInt('0')
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return Referrable.createReferrable(builder,
+    this.id
+  );
+}
+}