* Make i18n-helpers a requirement
* Skip mdbook-gettext for mdbook-xgettext
* Gettext finds PO file based on `book.language`
* Update workflow
No need to set `preprocessor.gettext.po-file`.
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Co-authored-by: Jooyung Han <jooyung@google.com>
* Move Cargo.toml for exercises to exercises directory.
* Create a workspace with both exercises and i18n-helpers.
* Build in CI as well as testing.
* Binaries must have a main function.
* No need for workspaces configuration for caching anymore.
