Replace typescript-formatter (#211810)

The typescript-formatter package isn't being maintained (lots of old PRs) and has broken in the most recent version of TS

Long term we may explore switching to another formatter, but for now I've hook up the basic formatter logic for our hygiene scripts

build/lib/formatter.js

@@ -0,0 +1,76 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.format = format;
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+const fs = require("fs");
+const path = require("path");
+const ts = require("typescript");
+class LanguageServiceHost {
+    files = {};
+    addFile(fileName, text) {
+        this.files[fileName] = ts.ScriptSnapshot.fromString(text);
+    }
+    fileExists(path) {
+        return !!this.files[path];
+    }
+    readFile(path) {
+        return this.files[path]?.getText(0, this.files[path].getLength());
+    }
+    // for ts.LanguageServiceHost
+    getCompilationSettings = () => ts.getDefaultCompilerOptions();
+    getScriptFileNames = () => Object.keys(this.files);
+    getScriptVersion = (_fileName) => '0';
+    getScriptSnapshot = (fileName) => this.files[fileName];
+    getCurrentDirectory = () => process.cwd();
+    getDefaultLibFileName = (options) => ts.getDefaultLibFilePath(options);
+}
+const defaults = {
+    baseIndentSize: 0,
+    indentSize: 4,
+    tabSize: 4,
+    indentStyle: ts.IndentStyle.Smart,
+    newLineCharacter: '\r\n',
+    convertTabsToSpaces: false,
+    insertSpaceAfterCommaDelimiter: true,
+    insertSpaceAfterSemicolonInForStatements: true,
+    insertSpaceBeforeAndAfterBinaryOperators: true,
+    insertSpaceAfterConstructor: false,
+    insertSpaceAfterKeywordsInControlFlowStatements: true,
+    insertSpaceAfterFunctionKeywordForAnonymousFunctions: false,
+    insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: false,
+    insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: false,
+    insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces: true,
+    insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: false,
+    insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces: false,
+    insertSpaceAfterTypeAssertion: false,
+    insertSpaceBeforeFunctionParenthesis: false,
+    placeOpenBraceOnNewLineForFunctions: false,
+    placeOpenBraceOnNewLineForControlBlocks: false,
+    insertSpaceBeforeTypeAnnotation: false,
+};
+const getOverrides = (() => {
+    let value;
+    return () => {
+        value ??= JSON.parse(fs.readFileSync(path.join(__dirname, '..', '..', 'tsfmt.json'), 'utf8'));
+        return value;
+    };
+})();
+function format(fileName, text) {
+    const host = new LanguageServiceHost();
+    host.addFile(fileName, text);
+    const languageService = ts.createLanguageService(host);
+    const edits = languageService.getFormattingEditsForDocument(fileName, { ...defaults, ...getOverrides() });
+    edits
+        .sort((a, b) => a.span.start - b.span.start)
+        .reverse()
+        .forEach(edit => {
+        const head = text.slice(0, edit.span.start);
+        const tail = text.slice(edit.span.start + edit.span.length);
+        text = `${head}${edit.newText}${tail}`;
+    });
+    return text;
+}
+//# sourceMappingURL=formatter.js.map