feat(i18n): add Norwegian (nb_NO) translation and clean up

- Add complete Norwegian (nb_NO) language file
- Update .gitignore to exclude temporary and backup files
- Remove temporary and backup files from language directory
- Clean up scripts directory and add to .gitignore
- Update language file format to use key-value pairs

.gitignore

@@ -0,0 +1,58 @@
+# Temporary files
+*.tmp
+*.bak
+*.backup
+*.swp
+*.swo
+*~
+*.new
+*.en
+.DS_Store
+.idea/
+.vscode/
+
+# Language directory temporary files
+include/qsgen2/lang/*.backup
+include/qsgen2/lang/*.bak
+include/qsgen2/lang/*.new
+include/qsgen2/lang/*.txt
+include/qsgen2/lang/*.en
+
+# Scripts directory (temporary/conversion scripts)
+/scripts/
+
+# Build output
+/build/
+/dist/
+*.o
+
+# Python cache
+__pycache__/
+*.py[cod]
+*$py.class
+
+# Node modules
+node_modules/
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Local development files
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# Editor directories and files
+.idea
+.vscode
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?