test: add navigation test case

[felixerdy]

This test navigates from the main page to the tutorial page and then back

Testing whether the blockly component still works after that

[github-actions]

Tests

Test Name	Status	Flaky	Duration
Blockly Editor Page Tests [Blockly] visits the editor page	✅		1.1s
Blockly Editor Page Tests [Blockly] visits the tutorial page	✅		175ms
Blockly Editor Page Tests [Blockly] visits the gallery page	✅		130ms
Blockly Editor Page Tests [Blockly] visits the faq page	✅		121ms
Blockly Editor Page Tests [Blockly] visits the settings page	✅		113ms
Blockly Editor Page Tests [Blockly] visits the login page	✅		121ms
Blockly Editor Page Tests [Blockly] navigates to tutorial and back	❌		13.9s
Blockly Editor Page Tests [Blockly] selects senseBox ESP	✅		768ms
Blockly Editor Page Tests [Blockly] selects senseBox MCU	✅		633ms
Blockly Editor Page Tests [Blockly] selects senseBox Mini	✅		723ms
Blockly Editor Page Tests [Blockly] compiles code	✅		10.0s
Code Editor Page Tests [CodeEditor] visits the code editor page	✅		1.4s
Code Editor Page Tests [CodeEditor] selects senseBox ESP	✅		472ms
Code Editor Page Tests [CodeEditor] compiles code	✅		606ms
Code Editor Page Tests [CodeEditor] opens reset dialog	✅		600ms
Code Editor Page Tests [CodeEditor] fetches libraries	✅		1.5s

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