Reduce size of TypeScript Compiler snapshot (#6809)

This PR is intentionally ugly. It duplicates all of the code in cli/js2/ into
cli/tsc/  ... because it's very important that we all understand that this code
is unnecessarily duplicated in our binary. I hope this ugliness provides the
motivation to clean it up.

The typescript git submodule is removed, because it's a very large repo and
contains all sorts of stuff we don't need. Instead the necessary files are
copied directly into the deno repo. Hence +200k lines.

COMPILER_SNAPSHOT.bin size
```
master         3448139
this branch    3320972
```

Fixes #6812

1 files changed, 61 insertions, 0 deletions

diff --git a/cli/dts/lib.es2018.intl.d.ts b/cli/dts/lib.es2018.intl.d.ts
new file mode 100644
index 000000000..0d7961101
--- /dev/null
+++ b/cli/dts/lib.es2018.intl.d.ts
@@ -0,0 +1,61 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+declare namespace Intl {
+
+    // http://cldr.unicode.org/index/cldr-spec/plural-rules#TOC-Determining-Plural-Categories
+    type LDMLPluralRule = "zero" | "one" | "two" | "few" | "many" | "other";
+    type PluralRuleType = "cardinal" | "ordinal";
+
+    interface PluralRulesOptions {
+        localeMatcher?: "lookup" | "best fit";
+        type?: PluralRuleType;
+        minimumIntegerDigits?: number;
+        minimumFractionDigits?: number;
+        maximumFractionDigits?: number;
+        minimumSignificantDigits?: number;
+        maximumSignificantDigits?: number;
+    }
+
+    interface ResolvedPluralRulesOptions {
+        locale: string;
+        pluralCategories: LDMLPluralRule[];
+        type: PluralRuleType;
+        minimumIntegerDigits: number;
+        minimumFractionDigits: number;
+        maximumFractionDigits: number;
+        minimumSignificantDigits?: number;
+        maximumSignificantDigits?: number;
+    }
+
+    interface PluralRules {
+        resolvedOptions(): ResolvedPluralRulesOptions;
+        select(n: number): LDMLPluralRule;
+    }
+
+    const PluralRules: {
+        new (locales?: string | string[], options?: PluralRulesOptions): PluralRules;
+        (locales?: string | string[], options?: PluralRulesOptions): PluralRules;
+        supportedLocalesOf(
+            locales: string | string[],
+            options?: PluralRulesOptions,
+        ): string[];
+    };
+}