(core) Faster builds all around.

Summary:
Building:
- Builds no longer wait for tsc for either client, server, or test targets. All use esbuild which is very fast.
- Build still runs tsc, but only to report errors. This may be turned off with `SKIP_TSC=1` env var.
- Grist-core continues to build using tsc.
- Esbuild requires ES6 module semantics. Typescript's esModuleInterop is turned
  on, so that tsc accepts and enforces correct usage.
- Client-side code is watched and bundled by webpack as before (using esbuild-loader)

Code changes:
- Imports must now follow ES6 semantics: `import * as X from ...` produces a
  module object; to import functions or class instances, use `import X from ...`.
- Everything is now built with isolatedModules flag. Some exports were updated for it.

Packages:
- Upgraded browserify dependency, and related packages (used for the distribution-building step).
- Building the distribution now uses esbuild's minification. babel-minify is no longer used.

Test Plan: Should have no behavior changes, existing tests should pass, and docker image should build too.

Reviewers: georgegevoian

Reviewed By: georgegevoian

Subscribers: alexmojaki

Differential Revision: https://phab.getgrist.com/D3506

app/client/ui/DocHistory.ts

@@ -12,7 +12,7 @@ import {buildUrlId, parseUrlId} from 'app/common/gristUrls';
 import {StringUnion} from 'app/common/StringUnion';
 import {DocSnapshot} from 'app/common/UserAPI';
 import {Disposable, dom, IDomComponent, MultiHolder, Observable, styled} from 'grainjs';
-import * as moment from 'moment';
+import moment from 'moment';
 
 const DocHistorySubTab = StringUnion("activity", "snapshots");
 

app/client/ui/FileDialog.ts

@@ -16,7 +16,7 @@
  */
 
 import * as browserGlobals from 'app/client/lib/browserGlobals';
-import * as dom from 'app/client/lib/dom';
+import dom from 'app/client/lib/dom';
 const G = browserGlobals.get('document', 'window');
 
 export interface FileDialogOptions {

app/client/ui/Pages.ts

@@ -3,7 +3,7 @@ import {duplicatePage} from 'app/client/components/duplicatePage';
 import {GristDoc} from 'app/client/components/GristDoc';
 import {PageRec} from 'app/client/models/DocModel';
 import {urlState} from 'app/client/models/gristUrlState';
-import * as MetaTableModel from 'app/client/models/MetaTableModel';
+import MetaTableModel from 'app/client/models/MetaTableModel';
 import {find as findInTree, fromTableData, TreeItemRecord, TreeRecord,
         TreeTableData} from 'app/client/models/TreeModel';
 import {TreeViewComponent} from 'app/client/ui/TreeViewComponent';

app/client/ui/RightPanel.ts

@@ -16,8 +16,8 @@
 
 import * as commands from 'app/client/components/commands';
 import {GristDoc, IExtraTool, TabContent} from 'app/client/components/GristDoc';
-import * as RefSelect from 'app/client/components/RefSelect';
-import * as ViewConfigTab from 'app/client/components/ViewConfigTab';
+import RefSelect from 'app/client/components/RefSelect';
+import ViewConfigTab from 'app/client/components/ViewConfigTab';
 import {domAsync} from 'app/client/lib/domAsync';
 import * as imports from 'app/client/lib/imports';
 import {createSessionObs} from 'app/client/lib/sessionObs';

app/client/ui/selectBy.ts

@@ -2,7 +2,7 @@ import { ColumnRec, DocModel, TableRec, ViewSectionRec } from 'app/client/models
 import { IPageWidget } from 'app/client/ui/PageWidgetPicker';
 import { getReferencedTableId } from 'app/common/gristTypes';
 import { IOptionFull } from 'grainjs';
-import * as assert from 'assert';
+import assert from 'assert';
 import * as gutil from "app/common/gutil";
 
 // some unicode characters