[TS] Add Build TS to CI jobs (#6524)

* Add Build TS to CI jobs

* Add npm compile step

* Fix syntax

* Add required code gen for TS

* Exit on failure

* Make TS code gen identical to test run

* Remove duplicate TS code gen artifacts

* Remove bad gitignore

* Forgot parts of generate_code and make sure same settings for test run

* Don't forget about the bat

* Try and fix flatc args

* Another attempt to fix args

* Fix typo

* Commit up to date code gen

* Another attempt to fix sh/bat

* Move -o param to after -I

* Commit missing code gen file

* Fix grpc code gen and test

* Another grpc code gen fix

* Rework to not use ts folder

* Fix env vars in bat and make less churn

* Move TS code gen to dedicated folder

* Fix transpilation output folder and module paths

* Fixes to code gen

* Include generated js

* Moved ts code gen

* Remove test ts code gen folder

tests/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);
+    }
+}