@coasys/ad4m-executor: LanguageController/LANGUAGE_CONTROLLER Typescript Type issues

[btakita]

globalThis.LANGUAGES is declared at https://github.com/coasys/ad4m/blob/dev/executor/src/languages_extension.d.ts#L38-L46

declare global {
    interface RustLanguages {
        perspectiveDiffReceived: (diff: PerspectiveDiff, languageAddress: string) => void;
        syncStateChanged: (state: PerspectiveState, languageAddress: string) => void;
        telepresenceSignalReceived: (signal: PerspectiveExpression, languageAddress: string) => void;
    }

    const LANGUAGES: RustLanguages;
}

But LANGUAGE_CONTROLLER is used at https://github.com/coasys/ad4m/blob/dev/executor/src/core/LanguageController.ts#L197-L216

There are other type errors when renaming this. Relating to @coasys/ad4m & @coasys/executor having different type definitions of:

• LinkExpression
• PerspectiveDiff
• PerspectiveExpression
• PerspectiveState