Add the documentation and new a build option (buildDev).

docs/adding_translations.md

@@ -0,0 +1,34 @@
+# How to add translations
+
+## Getting ready
+
+1. Clone this repository recursively.
+```sh
+git clone --recursive https://github.com/vrtmrz/obsidian-livesync
+```
+2. Make `ls-debug` folder under your vault's `.obsidian` folder (as like `.../dev/.obsidian/ls-debug`).
+
+## Add translations for already defined terms
+
+1. Install dependencies, and build the plug-in as dev. build.
+```sh
+cd obsidian-livesync
+npm i -D
+npm run buildDev
+```
+
+2. Copy the `main.js` to `.obsidian/plugins/obsidian-livesync` folder of your vault, and run Obsidian-Self-hosted LiveSync.
+3. You will get the `missing-translation-yyyy-mm-dd.jsonl`, please fill in new translations.
+4. Build the plug-in again, and confirm that displayed things were expected.
+5. Merge them into `rosetta.ts`, and make the PR to `https://github.com/vrtmrz/livesync-commonlib`.
+
+## Make messages to be translated
+
+1. Find the message that you want to be translated.
+2. Change the literal to a tagged template literal using `$f`, like below.
+```diff
+- Logger("Could not determine passphrase to save data.json! You probably make the configuration sure again!", LOG_LEVEL_URGENT);
++ Logger($f`Could not determine passphrase to save data.json! You probably make the configuration sure again!`, LOG_LEVEL_URGENT);
+```
+3. Make the PR to `https://github.com/vrtmrz/obsidian-livesync`.
+4. Follow the steps of "Add translations for already defined terms" to add the translations.