Bring the Chinese (Traditional) update forward from 5.x, release as 6.0.1

[snake14]

Description

Brings the Chinese (Traditional) translation forward from 5.x-dev and releases it as 6.0.1.

Weblate pushed e2c6b173 to 5.x-dev on 23 August. This component is one of the four still tracking 5.x-dev in Weblate, and Weblate does not backfill a branch when a component switches, so it never reached 6.x-dev. The Czech and French updates from the same period were already covered by #647.

Safe to take wholesale: the 5.x file is a strict superset — 94 keys are missing from 6.x, 76 values are newer on 5.x, and nothing exists only on 6.x, so no newer translation is overwritten. The file validates as JSON and no translated key lacks an en.json counterpart.

Released as 6.0.1 because 6.0.0 is already tagged and the Marketplace has ingested it, so there is no upcoming release for these strings to ride along in. Weblate pushes normally carry no version bump for exactly that reason — they land before a release; this one did not.

This recurs until the Weblate component is pointed at 6.x-dev (component settings -> Version control -> Repository branch, on Hosted Weblate).

Issue No

Part of the Matomo 6 plugin readiness work. No separate ticket.

Steps to Replicate the Issue

1. Compare lang/zh-tw.json between 5.x-dev and 6.x-dev.
2. Expected: both lines carry the same translations.
3. Actual: 6.x is missing 94 strings and holds 76 superseded ones, because Weblate pushes this component to 5.x only.

Checklist

• [✖] Tested locally or on demo2/demo3?
• [NA] New test case added/updated?
• [✔] Are all newly added texts included via translation?
• [NA] Are text sanitized properly? (Eg use of v-text v/s v-html for vue)
• [✔] Version bumped?
• [✔] I have understood, reviewed, and tested all AI outputs before use
• [✔] All AI instructions respect security, IP, and privacy rules
• [NA] Documentation updated?