(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/common/DocLimits.ts

@@ -1,7 +1,7 @@
 import {ApiError} from 'app/common/ApiError';
 import {APPROACHING_LIMIT_RATIO, DataLimitStatus, DocumentUsage, getUsageRatio} from 'app/common/DocUsage';
 import {Features} from 'app/common/Features';
-import * as moment from 'moment-timezone';
+import moment from 'moment-timezone';
 
 /**
  * Error class indicating failure due to limits being exceeded.

app/common/UserAPI.ts

@@ -9,13 +9,13 @@ import {OrgUsageSummary} from 'app/common/DocUsage';
 import {Product} from 'app/common/Features';
 import {ICustomWidget} from 'app/common/CustomWidget';
 import {isClient} from 'app/common/gristUrls';
-import {FullUser} from 'app/common/LoginSessionAPI';
+import {FullUser, UserProfile} from 'app/common/LoginSessionAPI';
 import {OrgPrefs, UserOrgPrefs, UserPrefs} from 'app/common/Prefs';
 import * as roles from 'app/common/roles';
 import {addCurrentOrgToPath} from 'app/common/urlUtils';
 import {encodeQueryParams} from 'app/common/gutil';
 
-export {FullUser} from 'app/common/LoginSessionAPI';
+export type {FullUser, UserProfile};
 
 // Nominal email address of the anonymous user.
 export const ANONYMOUS_USER_EMAIL = 'anon@getgrist.com';
@@ -285,8 +285,6 @@ export interface DocStateComparisonDetails {
   rightChanges: ActionSummary;
 }
 
-export {UserProfile} from 'app/common/LoginSessionAPI';
-
 export interface UserAPI {
   getSessionActive(): Promise<ActiveSessionInfo>;
   setSessionActive(email: string): Promise<void>;

app/common/ValueFormatter.ts

@@ -12,7 +12,7 @@ import {buildNumberFormat, NumberFormatOptions} from 'app/common/NumberFormat';
 import {createParserOrFormatterArguments, ReferenceParsingOptions} from 'app/common/ValueParser';
 import {GristObjCode} from 'app/plugin/GristData';
 import {decodeObject, GristDateTime} from 'app/plugin/objtypes';
-import * as moment from 'moment-timezone';
+import moment from 'moment-timezone';
 import isPlainObject = require('lodash/isPlainObject');
 
 export {PENDING_DATA_PLACEHOLDER} from 'app/plugin/objtypes';

app/common/marshal.ts

@@ -25,7 +25,7 @@
  * unmarshalled to JS strings if 'bufferToString' option is set.
  */
 import {BigInt} from 'app/common/BigInt';
-import * as MemBuffer from 'app/common/MemBuffer';
+import MemBuffer from 'app/common/MemBuffer';
 import {EventEmitter} from 'events';
 import * as util from 'util';
 

app/common/parseDate.ts

@@ -3,8 +3,8 @@ import last = require('lodash/last');
 import memoize = require('lodash/memoize');
 import {getDistinctValues, isNonNullish} from 'app/common/gutil';
 // Simply importing 'moment-guess' inconsistently imports bundle.js or bundle.esm.js depending on environment
-import * as guessFormat from '@gristlabs/moment-guess/dist/bundle.js';
-import * as moment from 'moment-timezone';
+import guessFormat from '@gristlabs/moment-guess/dist/bundle.js';
+import moment from 'moment-timezone';
 
 // When using YY format, use a consistent interpretation in datepicker and in moment parsing: add
 // 2000 if the result is at most 10 years greater than the current year; otherwise add 1900. See