[FEATURE] - PR5 : Web tests

[pulk17]

[FEATURE]

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The regression suite. Depends on #1199.

What's here
A filterable list of tests with a category rail, a "failing only" toggle, and search across command and sample name. Selecting one shows its command, input and output type, expected return code, per-platform run history as a sparkline, and its baselines.

Baselines can have variants - alternative accepted hashes - and those can be added and removed here.

Plus the test builder: defining a new test against a sample, with the command, expected return code and categories.

Review notes
New tests are created inactive unless explicitly asked otherwise, matching the API's default. The builder offers command presets derived from what the existing suite actually uses, rather than a hardcoded list.

Test history comes from a single shared query, so the sparkline on a row costs no extra request.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud