This makes sure that if folks get a relatively recent `vscode.d.ts`. It also lets us safely bump up the target to es2024 so you can use all the latest lib additions
This fixes a warning about running on an unsupported TypeScript version. Also makes sure we do not lint any `.vscode-test` contents if they are present
Switches all samples to use eslint 9 with flat configs. I've tried to migrate existing settings as much as possible. However our eslint configs were also inconsistent so I've tried to align these too
- Update @vscode/test-electron due to some bugs
- Update @vscode/test-cli for modern goodness
- vscode-dts -> @vscode/dts off of the deprecated name
- @types/node to 18 to match VS Code itself
* add l10n extension sample, delete vscode-nls sample
* rev l10n versions
* fix a couple typos
* move around sections
* updates
* final
* include link to API
