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, 47 insertions, 0 deletions

diff --git a/cli/dts/lib.es2017.string.d.ts b/cli/dts/lib.es2017.string.d.ts
new file mode 100644
index 000000000..4b219e6c5
--- /dev/null
+++ b/cli/dts/lib.es2017.string.d.ts
@@ -0,0 +1,47 @@
+/*! *****************************************************************************
+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"/>
+
+
+interface String {
+    /**
+     * Pads the current string with a given string (possibly repeated) so that the resulting string reaches a given length.
+     * The padding is applied from the start (left) of the current string.
+     *
+     * @param maxLength The length of the resulting string once the current string has been padded.
+     *        If this parameter is smaller than the current string's length, the current string will be returned as it is.
+     *
+     * @param fillString The string to pad the current string with.
+     *        If this string is too long, it will be truncated and the left-most part will be applied.
+     *        The default value for this parameter is " " (U+0020).
+     */
+    padStart(maxLength: number, fillString?: string): string;
+
+    /**
+     * Pads the current string with a given string (possibly repeated) so that the resulting string reaches a given length.
+     * The padding is applied from the end (right) of the current string.
+     *
+     * @param maxLength The length of the resulting string once the current string has been padded.
+     *        If this parameter is smaller than the current string's length, the current string will be returned as it is.
+     *
+     * @param fillString The string to pad the current string with.
+     *        If this string is too long, it will be truncated and the left-most part will be applied.
+     *        The default value for this parameter is " " (U+0020).
+     */
+    padEnd(maxLength: number, fillString?: string): string;
+}