jsDoc intellisense support for @typedef in another file

Issue Type: Feature Request

Intellisense uses @typedef tags in other files but only if the file is opened in current window. Please allow any typedef tag to be used inside current working directory even if file containing typedef is not opened.

Here is what i mean. I annotated a variable with type. This variable is exported directly with module.exports.

My typedef is in seperate file.
Configuration.js

/**
 * @typedef {Object} ConfigurationInputDirectories
 * @property {string} modules
 * @property {string} layoutModules
 * @property {string} standaloneScripts
 * @property {string} standaloneStyles
 * @property {string} libraryScripts
 * @property {string} libraryStyles
 * @property {string} markupTemplates
 */

/**
 * @typedef {Object} ConfigurationOutputDirectories
 * @property {string} pageScripts
 * @property {string} vendorScripts
 * @property {string} standaloneScripts
 * @property {string} pageStyles
 * @property {string} vendorStyles
 * @property {string} standaloneStyles
 * @property {string} markupFiles
 */

/**
 * @typedef {Object} ConfigurationVendor
 * @property {string} standardPath
 * @property {string} minPath
 */

/**
 * @typedef {Object} ConfigurationModule
 * @property {string} layoutModule
 * @property {string} markupTemplate
 * @property {string[]} includeStandaloneScripts
 * @property {string[]} includeStandaloneStyles
 * @property {string[]} includeVendorScripts
 * @property {string[]} includeVendorStyles
 * @property {string[]} excludeStandaloneScripts
 * @property {string[]} excludeStandaloneStyles
 * @property {string[]} excludeVendorScripts
 * @property {string[]} excludeVendorStyles
 */


/**
 * @typedef {Object} ConfigurationLayoutModule
 * @property {string} layoutModule
 * @property {string} markupTemplate
 * @property {string[]} includeStandaloneScripts
 * @property {string[]} includeStandaloneStyles
 * @property {string[]} includeVendorScripts
 * @property {string[]} includeVendorStyles
 * @property {string[]} excludeStandaloneScripts
 * @property {string[]} excludeStandaloneStyles
 * @property {string[]} excludeVendorScripts
 * @property {string[]} excludeVendorStyles
 */

/**
 * Represents configuration object for build process.
 * @typedef {Object} Configuration
 * @property {ConfigurationInputDirectories} inputDirectories
 * @property {ConfigurationOutputDirectories} outputDirectories
 * @property {Object.<string,ConfigurationVendor} vendorScripts
 * @property {Object.<string,ConfigurationVendor>} vendorStyles
 * @property {Object.<string,ConfigurationModule>} modules
 * @property {Object.<string,ConfigurationLayoutModule>} layoutModules
 * @property {string} defaultMarkupTemplate
 * @property {string} contentPlaceHolder
 * @property {string} nameDirectorySeperator
 * @property {string[]} validLibraryEntryFileNames
 * @property {string} moduleFileName
 * @property {string} rootModuleFileName
 * @property {string} systemjsPath
 * @property {string} systemjsNamedRegistersPath
 */

When this file containing type definitions is open the intellisense/language service/or whatever you call it is recognizing this variable's type and intellisense displays the members when using this config variable. But when file is closed its type turns to any. It would be nice to see type informations from typedef tags even if files containing tags are closed.

VS Code version: Code 1.33.0 (0dd516dd412d42323fc3464531b1c715d51c4c1a, 2019-04-04T15:14:28.026Z)
OS version: Windows_NT x64 10.0.17134

提供された Configuration.js の typedef と、別の module.exports コンシューマーを使って問題を再現します。まず typedef ファイルを開いた状態で、次に閉じた状態で行います。JavaScript language service による JSDoc @typedef の検出を追跡し、コンシューマーが現在の作業ディレクトリ全体でそれらの型を解決できるようにします。両方の場合で IntelliSense に typedef のメンバーが表示されれば完了です。