Add type declarations for [bristol] logger (#38042)

* [bristol] Added types for bristol logger

* [bristol] made recommended changes for most common use cases

types/bristol/bristol-tests.ts

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+import bristol = require('bristol');
+
+bristol.addTarget('console');
+bristol.info('Things be working.', {});
+
+bristol.addTarget('console').withFormatter('human');
+bristol.debug('Hello, world', { code: 404 });
+
+const uhoh = {
+  code: 500,
+  error: {
+    message: 'Something broke',
+    reason: 'idk why though',
+  },
+};
+
+bristol.error('Something went wrong', uhoh);

types/bristol/index.d.ts

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+// Type definitions for bristol 0.4
+// Project: https://github.com/TomFrost/Bristol
+// Definitions by: Eric Heikes <https://github.com/eheikes>
+//                 Elliott Campbell <https://github.com/ElliottCampbellJHA>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+// Caveat: Currently, .d.ts files are unable to handle this package fully
+//         as it requires both class and namespace be exported.
+
+interface LogError {
+    message?: string;
+    reason?: any;
+    stack?: any;
+}
+
+interface LogData {
+    code?: number;
+    id?: string;
+    path?: string;
+    error?: LogError;
+    data?: any;
+}
+
+declare class Bristol {
+  addTarget(target: any, opts?: any): any;
+  withFormatter(formatter: string): any;
+  withLowestSeverity(severity: string): any;
+  info(message: string, data: LogData): any;
+  warn(message: string, data: LogData): any;
+  error(message: string, data: LogData): any;
+  debug(message: string, data: LogData): any;
+}
+
+declare const bristol: Bristol;
+
+export = bristol;

types/bristol/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "bristol-tests.ts"
+    ]
+}

types/bristol/tslint.json

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+{ "extends": "dtslint/dt.json" }