add .gitignore, clean up generated files from node_modules

Remove from tracking:
- dist/ (build output, regenerated by bun run build.ts)
- node_modules/.pnpm/ (pnpm internal store, 247MB)
- node_modules/.bin/ (executable symlinks)
- node_modules/.ignored/ and .ignored_* (source-map dirs moved aside by pnpm)
- 100 pnpm-installed package symlinks (regenerated by pnpm install)

Keep in tracking:
- Private package stubs not on npm (color-diff-napi, modifiers-napi,
  @ant/claude-for-chrome-mcp, @anthropic-ai/mcpb, @anthropic-ai/sandbox-runtime)
- Source-map extracted packages not installed by pnpm (@grpc/*, @protobufjs/*, etc.)

claude-code-source/node_modules/@azure/msal-node/dist/retry/ImdsRetryPolicy.mjs

@@ -1,90 +0,0 @@
-/*! @azure/msal-node v3.8.1 2025-10-29 */
-'use strict';
-import { HttpStatus } from '@azure/msal-common';
-import { ExponentialRetryStrategy } from './ExponentialRetryStrategy.mjs';
-
-/*
- * Copyright (c) Microsoft Corporation. All rights reserved.
- * Licensed under the MIT License.
- */
-const HTTP_STATUS_400_CODES_FOR_EXPONENTIAL_STRATEGY = [
-    HttpStatus.NOT_FOUND,
-    HttpStatus.REQUEST_TIMEOUT,
-    HttpStatus.GONE,
-    HttpStatus.TOO_MANY_REQUESTS,
-];
-const EXPONENTIAL_STRATEGY_NUM_RETRIES = 3;
-const LINEAR_STRATEGY_NUM_RETRIES = 7;
-const MIN_EXPONENTIAL_BACKOFF_MS = 1000;
-const MAX_EXPONENTIAL_BACKOFF_MS = 4000;
-const EXPONENTIAL_DELTA_BACKOFF_MS = 2000;
-const HTTP_STATUS_GONE_RETRY_AFTER_MS = 10 * 1000; // 10 seconds
-class ImdsRetryPolicy {
-    constructor() {
-        this.exponentialRetryStrategy = new ExponentialRetryStrategy(ImdsRetryPolicy.MIN_EXPONENTIAL_BACKOFF_MS, ImdsRetryPolicy.MAX_EXPONENTIAL_BACKOFF_MS, ImdsRetryPolicy.EXPONENTIAL_DELTA_BACKOFF_MS);
-    }
-    /*
-     * these are defined here as static variables despite being defined as constants outside of the
-     * class because they need to be overridden in the unit tests so that the unit tests run faster
-     */
-    static get MIN_EXPONENTIAL_BACKOFF_MS() {
-        return MIN_EXPONENTIAL_BACKOFF_MS;
-    }
-    static get MAX_EXPONENTIAL_BACKOFF_MS() {
-        return MAX_EXPONENTIAL_BACKOFF_MS;
-    }
-    static get EXPONENTIAL_DELTA_BACKOFF_MS() {
-        return EXPONENTIAL_DELTA_BACKOFF_MS;
-    }
-    static get HTTP_STATUS_GONE_RETRY_AFTER_MS() {
-        return HTTP_STATUS_GONE_RETRY_AFTER_MS;
-    }
-    set isNewRequest(value) {
-        this._isNewRequest = value;
-    }
-    /**
-     * Pauses execution for a calculated delay before retrying a request.
-     *
-     * @param httpStatusCode - The HTTP status code of the response.
-     * @param currentRetry - The current retry attempt number.
-     * @param retryAfterHeader - The value of the "retry-after" header from the response.
-     * @returns A promise that resolves to a boolean indicating whether a retry should be attempted.
-     */
-    async pauseForRetry(httpStatusCode, currentRetry, logger) {
-        if (this._isNewRequest) {
-            this._isNewRequest = false;
-            // calculate the maxRetries based on the status code, once per request
-            this.maxRetries =
-                httpStatusCode === HttpStatus.GONE
-                    ? LINEAR_STRATEGY_NUM_RETRIES
-                    : EXPONENTIAL_STRATEGY_NUM_RETRIES;
-        }
-        /**
-         * (status code is one of the retriable 400 status code
-         * or
-         * status code is >= 500 and <= 599)
-         * and
-         * current count of retries is less than the max number of retries
-         */
-        if ((HTTP_STATUS_400_CODES_FOR_EXPONENTIAL_STRATEGY.includes(httpStatusCode) ||
-            (httpStatusCode >= HttpStatus.SERVER_ERROR_RANGE_START &&
-                httpStatusCode <= HttpStatus.SERVER_ERROR_RANGE_END &&
-                currentRetry < this.maxRetries)) &&
-            currentRetry < this.maxRetries) {
-            const retryAfterDelay = httpStatusCode === HttpStatus.GONE
-                ? ImdsRetryPolicy.HTTP_STATUS_GONE_RETRY_AFTER_MS
-                : this.exponentialRetryStrategy.calculateDelay(currentRetry);
-            logger.verbose(`Retrying request in ${retryAfterDelay}ms (retry attempt: ${currentRetry + 1})`);
-            // pause execution for the calculated delay
-            await new Promise((resolve) => {
-                return setTimeout(resolve, retryAfterDelay);
-            });
-            return true;
-        }
-        // if the status code is not retriable or max retries have been reached, do not retry
-        return false;
-    }
-}
-
-export { ImdsRetryPolicy };
-//# sourceMappingURL=ImdsRetryPolicy.mjs.map