feat: make the studio storage reset actually clean everything

[denishacquin]

Fixes #616

What

• Resetting the storage now resets all txs, contracts and deployments for local storage and local db, as well as tx socket subscriptions

• Added a download button in the contract files for more easily saving files

• Fixed: the "go to settings" link in a contract when zero validators -> now "go to validators"

• Fixed: missing "No parameters" empty state placeholder in constructor params when no params detected

Why

• To allow people to really clean their storage especially when sth breaks
• To allow people to save a file easily before resetting everything
• To fix small bugs

Testing done

• tested the new feature and bug fixes
• fixed some linting
• units frontend OK
• e2e OK

Decisions made

• Decided to add a download button on files

Checks

• I have tested this code
• I have reviewed my own PR
• I have created an issue for this PR
• I have set a descriptive PR title compliant with conventional commits

User facing release notes

• The Reset storage feature now actually resets everything stored locally (contracts, transactions, deployments)
• Added a Download button on contract files to easily save your work (useful if you want to reset everything)
• Fixed some minor issues

[codecov]

Codecov Report

Attention: Patch coverage is 21.05263% with 60 lines in your changes missing coverage. Please review.

Project coverage is 19.31%. Comparing base (b09dfed) to head (3cdb63a).

Files with missing lines	Patch %	Lines
...components/Simulator/settings/SimulatorSection.vue	0.00%	31 Missing ⚠️
frontend/src/components/Simulator/ContractItem.vue	0.00%	21 Missing ⚠️
...ontend/src/components/Simulator/ContractParams.vue	0.00%	6 Missing ⚠️
frontend/src/components/Simulator/ContractInfo.vue	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #648      +/-   ##
==========================================
- Coverage   19.55%   19.31%   -0.25%     
==========================================
  Files         129      129              
  Lines       10006    10002       -4     
  Branches      319      311       -8     
==========================================
- Hits         1957     1932      -25     
- Misses       7964     7985      +21     
  Partials       85       85              

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[sonarqubecloud]

Quality Gate failed

Failed conditions
0.0% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud

[github-actions]

🎉 This PR is included in version 0.25.0 🎉

The release is available on GitHub release

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