Issues/feedback related to v0.3

Issues and feedback related v0.3
```[tasklist]
### Tasks
- [x] Readability of "Help" section needs to be improved
- [x] Behaviour of the "Instructions" section is inapproriate - it simply toggles between appearing and disappearing when "instructions" is clicked. And also it replaces the output section which loses results of the last run.
- [ ] Implement links for each example, in a way they can be shared individually
- [x] Advice provider example runs into failures
- [x] Std library example runs into failures
- [x] Behaviour of "proving" toast component when tried to prove on a failing code needs to be fixed
- [ ] The button to download the ".masm" files is counterintuitive - it is hardly recognizable as a download button
- [ ] According to its behaviour the collapse button in the input panel is supposed to change from "+" to "-" rather than changing its colour from green to grey.
- [ ] https://github.com/0xPolygonMiden/examples/issues/174
- [ ] The debug view has few areas where it can be fixed/improved: the relevance of green numbers at the initial stage is very less, the "|<" and "<<" buttons does not appear to work when pressed first - shall be disabled in that case,
- [ ] It's hard to understand what is the VM's stack when going backwards; esp. if the state is changed to use a table.
- [x] Using the buttons ">>" and ">|" seem to print only the last state of the VM. That is not super useful for debugging one wants to see all intermediary values.
- [x] Verification of the matrix multiplication doesn't work
- [x] There is no output shown when "Prove" button is clicked
```

This is a meta-issue tracking multiple frontend and UI bugs for version 0.3 of a tool. The tasks involve fixing UI components like toasts, buttons, and debug views, and improving behaviors like example linking and file downloads. Start by exploring the frontend codebase to locate the relevant UI components (Help section, Instructions panel, download button, debug view controls). Check the linked issue #174 for more context. 'Done' means each checked task in the list is addressed.

Rédigé par le modèle d'indexation à partir du texte de l'issue.