[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/union_vector/book-reader.js

@@ -0,0 +1,44 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+export class BookReader {
+    constructor() {
+        this.bb = null;
+        this.bb_pos = 0;
+    }
+    __init(i, bb) {
+        this.bb_pos = i;
+        this.bb = bb;
+        return this;
+    }
+    booksRead() {
+        return this.bb.readInt32(this.bb_pos);
+    }
+    mutate_books_read(value) {
+        this.bb.writeInt32(this.bb_pos + 0, value);
+        return true;
+    }
+    static getFullyQualifiedName() {
+        return 'BookReader';
+    }
+    static sizeOf() {
+        return 4;
+    }
+    static createBookReader(builder, books_read) {
+        builder.prep(4, 4);
+        builder.writeInt32(books_read);
+        return builder.offset();
+    }
+    unpack() {
+        return new BookReaderT(this.booksRead());
+    }
+    unpackTo(_o) {
+        _o.booksRead = this.booksRead();
+    }
+}
+export class BookReaderT {
+    constructor(booksRead = 0) {
+        this.booksRead = booksRead;
+    }
+    pack(builder) {
+        return BookReader.createBookReader(builder, this.booksRead);
+    }
+}