[TS/JS] New gen TS code gen (#6302)

* TS/ES6 modules spike iteration 1

* Initial modularized dasherized output

* Remove obsoleted parts and namespace wrapping

* Use _flatbuffers_ prefix

* First part of imports logic

* Second part of imports logic

* Fix TS/JS code removal mixup

* Alias imported symbols if same name from different namespaces and some fixes

* Use star import for bare imports

* Fix messed up string concat

* var to const and remove not needed semi

* Remove some cases of ns prefixing

* Add missing space

* Cleanups

* Completed initial import tracking logic

* Compilable output

* Adjust TypeScriptTest and dependents to work

* Use local flatbuffers package for tests

* Refactor away use of any

* Remove obsolete imported_fileset and reexport_map

* Still need any and fix JavaScriptTest.sh

* Fix test runs out of the box

* Temp add generated files

* TypeScriptTest replaces JavaScriptTest and cleanups

* Also remove reference to JavaScriptTest in TestAll.sh

* Remove old generated ts/js files

* Remove use of --js in generate_code scripts

* idl_gen_js_ts to idl_gen_ts and removal of js gen

* Remove obsoleted options

* Fix obsolete ts test detection

* Tweak ts compilation be as strict as possible

* Remove jsdoc type annotation generation

* Generated test ts files

* Fix search and replace messup

* Regenerated ts test output

* Use CharToLower

* Use normal for loop

* Rework namespacedir

* Revert "Rework namespacedir"

This reverts commit 6f4eb0104ceeb86011bb076ebca901138c48e068.

* Revert "Use normal for loop"

This reverts commit 676b2135bfaa1853dfbb06c92b5c16a0d81bb13a.

* Revert "Use CharToLower"

This reverts commit 2d08648d0d72d0af201fad80d54cdc76412b35e9.

* Again do rework but correct

* Avoid runtime cast

* Fix test runs

* Also add npm install to get tsc

* Bump node test versions

* for range to std for loop

* Clang format

* Missed one clang format

* Move accessor to later

* Attempt to make windows version of TypeScriptTest

* Want to see the output

* Try to get newer node at appveyor

* Style changes

appveyor.yml

@@ -3,6 +3,7 @@ branches:
     - master
 
 environment:
+  nodejs_version: "14"
 
   global:
     # Workaround for https://github.com/conda/conda-build/issues/636
@@ -50,6 +51,7 @@ after_build:
 
 install:
   - set PATH=%CONDA_INSTALL_LOCN%;%CONDA_INSTALL_LOCN%\scripts;%PATH%;
+  - ps: Install-Product node $env:nodejs_version
 
 test_script:
   - call .appveyor\check-generate-code.bat -b %CONFIGURATION%
@@ -60,13 +62,12 @@ test_script:
   - rem "---------------- C++ -----------------"
   - "cd .."
   - "%CONFIGURATION%\\flattests.exe"
-  - "cd tests"
   - rem "---------------- JS -----------------"
   - "node --version"
-  - "..\\%CONFIGURATION%\\flatc -b -I include_test monster_test.fbs unicode_test.json"
   - "npm install"
-  - "npm run pretest"
-  - "node JavaScriptTest ./monster_test_generated"
+  - "npm run compile"
+  - "cd tests"
+  - "TypeScriptTest.bat"
   - rem "---------------- C# -----------------"
   # Have to compile this here rather than in "build" above because AppVeyor only
   # supports building one project??