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/@aws-sdk/credential-provider-process/dist-cjs/index.js

@@ -1,79 +0,0 @@
-'use strict';
-
-var sharedIniFileLoader = require('@smithy/shared-ini-file-loader');
-var propertyProvider = require('@smithy/property-provider');
-var child_process = require('child_process');
-var util = require('util');
-var client = require('@aws-sdk/core/client');
-
-const getValidatedProcessCredentials = (profileName, data, profiles) => {
-    if (data.Version !== 1) {
-        throw Error(`Profile ${profileName} credential_process did not return Version 1.`);
-    }
-    if (data.AccessKeyId === undefined || data.SecretAccessKey === undefined) {
-        throw Error(`Profile ${profileName} credential_process returned invalid credentials.`);
-    }
-    if (data.Expiration) {
-        const currentTime = new Date();
-        const expireTime = new Date(data.Expiration);
-        if (expireTime < currentTime) {
-            throw Error(`Profile ${profileName} credential_process returned expired credentials.`);
-        }
-    }
-    let accountId = data.AccountId;
-    if (!accountId && profiles?.[profileName]?.aws_account_id) {
-        accountId = profiles[profileName].aws_account_id;
-    }
-    const credentials = {
-        accessKeyId: data.AccessKeyId,
-        secretAccessKey: data.SecretAccessKey,
-        ...(data.SessionToken && { sessionToken: data.SessionToken }),
-        ...(data.Expiration && { expiration: new Date(data.Expiration) }),
-        ...(data.CredentialScope && { credentialScope: data.CredentialScope }),
-        ...(accountId && { accountId }),
-    };
-    client.setCredentialFeature(credentials, "CREDENTIALS_PROCESS", "w");
-    return credentials;
-};
-
-const resolveProcessCredentials = async (profileName, profiles, logger) => {
-    const profile = profiles[profileName];
-    if (profiles[profileName]) {
-        const credentialProcess = profile["credential_process"];
-        if (credentialProcess !== undefined) {
-            const execPromise = util.promisify(sharedIniFileLoader.externalDataInterceptor?.getTokenRecord?.().exec ?? child_process.exec);
-            try {
-                const { stdout } = await execPromise(credentialProcess);
-                let data;
-                try {
-                    data = JSON.parse(stdout.trim());
-                }
-                catch {
-                    throw Error(`Profile ${profileName} credential_process returned invalid JSON.`);
-                }
-                return getValidatedProcessCredentials(profileName, data, profiles);
-            }
-            catch (error) {
-                throw new propertyProvider.CredentialsProviderError(error.message, { logger });
-            }
-        }
-        else {
-            throw new propertyProvider.CredentialsProviderError(`Profile ${profileName} did not contain credential_process.`, { logger });
-        }
-    }
-    else {
-        throw new propertyProvider.CredentialsProviderError(`Profile ${profileName} could not be found in shared credentials file.`, {
-            logger,
-        });
-    }
-};
-
-const fromProcess = (init = {}) => async ({ callerClientConfig } = {}) => {
-    init.logger?.debug("@aws-sdk/credential-provider-process - fromProcess");
-    const profiles = await sharedIniFileLoader.parseKnownFiles(init);
-    return resolveProcessCredentials(sharedIniFileLoader.getProfileName({
-        profile: init.profile ?? callerClientConfig?.profile,
-    }), profiles, init.logger);
-};
-
-exports.fromProcess = fromProcess;