[l10n] Complete translations (#3794)

**Short description**: I completed the translations with the help of
translation tools.

**Long description**: I'm currently looking at the translation-tests and
I noticed the e2e-test `${language} should contain all base keys, ()`.
It is supposed to check whether all keys are present in each translation
file, but it doesn't actually work that way. When I fix it, a lot of
missing translations are reported. I have completed these translations
with the help of translation tools and packed them into this PR. I have
left out the modified test so that we can focus on the question if we
accept such amount of automatic translations or not.

rejas has already expressed in another PR
(https://github.com/MagicMirrorOrg/MagicMirror/pull/3775#discussion_r2083099252)
that he prefers human translators. I basically do too, but I don't see
how we can manage to have all translations completed by humans. And even
if a few translations are not correct, hopefully a user will get in
touch.

If we decide against the translations, we should at least remove the
test. If we go for the tranlsations, I'll add the test.

What do you think?

---------

Co-authored-by: Magnus <34011212+MagMar94@users.noreply.github.com>

translations/zh-tw.json

@@ -29,6 +29,7 @@
 
 	"FEELS": "體感溫度 {DEGREE}",
 	"PRECIP_POP": "降雨機率",
+	"PRECIP_AMOUNT": "降雨量",
 
 	"MODULE_CONFIG_CHANGED": "模組 {MODULE_NAME} 的設定檔選項已更改。\n請參見說明文件。",
 	"MODULE_CONFIG_ERROR": "{MODULE_NAME} 模組發生錯誤。{ERROR}",
@@ -42,5 +43,8 @@
 	"UPDATE_NOTIFICATION": "MagicMirror² 有可用更新。",
 	"UPDATE_NOTIFICATION_MODULE": "{MODULE_NAME} 模組有可用更新。",
 	"UPDATE_INFO_SINGLE": "目前版本在 {BRANCH_NAME} 分支上已落後了 {COMMIT_COUNT} 次 commit。",
-	"UPDATE_INFO_MULTIPLE": "目前版本在 {BRANCH_NAME} 分支上已落後了 {COMMIT_COUNT} 次 commit。"
+	"UPDATE_INFO_MULTIPLE": "目前版本在 {BRANCH_NAME} 分支上已落後了 {COMMIT_COUNT} 次 commit。",
+	"UPDATE_NOTIFICATION_DONE": "{MODULE_NAME} 模組更新完成。",
+	"UPDATE_NOTIFICATION_ERROR": "{MODULE_NAME} 模組更新錯誤。",
+	"UPDATE_NOTIFICATION_NEED-RESTART": "需要重新啟動 MagicMirror。"
 }