tsconfig: Enable isolatedModules (#1829)

esbuild recommends enabling this to avoid miscompilation.

- https://esbuild.github.io/content-types/#isolated-modules
- https://www.typescriptlang.org/tsconfig/isolatedModules.html

## Checklist

- [ ] I have added
[tests](https://www.cursorless.org/docs/contributing/test-case-recorder/)
- [ ] I have updated the
[docs](https://github.com/cursorless-dev/cursorless/tree/main/docs) and
[cheatsheet](https://github.com/cursorless-dev/cursorless/tree/main/cursorless-talon/src/cheatsheet)
- [ ] I have not broken the cheatsheet

Author: auscompgeek

packages/common/src/index.ts

@@ -1,8 +1,8 @@
 export * from "./cursorlessCommandIds";
 export * from "./testUtil/extractTargetedMarks";
 export { default as FakeIDE } from "./ide/fake/FakeIDE";
-export { Message } from "./ide/spy/SpyMessages";
-export { SpyIDERecordedValues } from "./ide/spy/SpyIDE";
+export type { Message } from "./ide/spy/SpyMessages";
+export type { SpyIDERecordedValues } from "./ide/spy/SpyIDE";
 export { default as SpyIDE } from "./ide/spy/SpyIDE";
 export { HatStability } from "./ide/types/HatStability";
 export * from "./util";
@@ -11,8 +11,9 @@ export { getKey, splitKey } from "./util/splitKey";
 export { hrtimeBigintToSeconds } from "./util/timeUtils";
 export * from "./util/walkSync";
 export * from "./util/walkAsync";
-export { Listener, Notifier } from "./util/Notifier";
-export { TokenHatSplittingMode } from "./ide/types/Configuration";
+export { Notifier } from "./util/Notifier";
+export type { Listener } from "./util/Notifier";
+export type { TokenHatSplittingMode } from "./ide/types/Configuration";
 export * from "./ide/types/ide.types";
 export * from "./ide/types/Capabilities";
 export * from "./ide/types/CommandId";

tsconfig.base.json

@@ -10,6 +10,7 @@
     "resolveJsonModule": true,
     "composite": true,
     "forceConsistentCasingInFileNames": true,
+    "isolatedModules": true,
     "strict": true
   }
 }