Add translations for 1.6.8 from GlotPress

[wojtekn]

Related issues

• Related to pfHvTO-T7-p2

Proposed Changes

• I propose adding translations from GlotPress.

Testing Instructions

• Change Studio UI language to another one
• Confirm translations are displayed

Pre-merge Checklist

• Have you checked for TypeScript, React or other console errors?

[wpmobilebot]

📊 Performance Test Results

Comparing ca84485 vs trunk

site-editor

Metric	trunk	ca84485	Diff	Change
load	5056.00 ms	6964.00 ms	+1908.00 ms	🔴 37.7%

site-startup

Metric	trunk	ca84485	Diff	Change
siteCreation	16104.00 ms	9061.00 ms	-7043.00 ms	🟢 -43.7%
siteStartup	3956.00 ms	3955.00 ms	-1.00 ms	🟢 -0.0%

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Results are median values from multiple test runs.

Legend: 🟢 Improvement (faster) | 🔴 Regression (slower) | ⚪ No change