chore: ignore jscpd report and remove it from version control

The jscpd-report.json file is a generated artifact from code duplication
analysis and should not be committed. This change:

- Adds report/jscpd-report.json to .gitignore to prevent future commits
- Removes the already-tracked jscpd-report.json from version control

The report/ directory remains in git (for potential future artifacts that
should be tracked), but the jscpd-generated JSON report is now ignored.

Related: commit 56b9cf3 previously staged the report directory

💘 Generated with Crush

Assisted-by: Crush:MiniMax-M2.7-highspeed

Author: LarsArtmann

.gitignore

@@ -9,6 +9,9 @@ lerna-debug.log*
 # Diagnostic reports (https://nodejs.org/api/report.html)
 report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
 
+# jscpd
+report/jscpd-report.json
+
 # Runtime data
 pids
 *.pid