Improve rendering of parameters.

src/lib/components/parameters/ParameterTree.svelte

src/lib/components/parameters/ParameterView.svelte

src/lib/components/parameters/ParametersSearch.svelte

src/lib/components/variables/VariableReferredInputs.svelte

...ib/components/variables/VariableReferredParameters.svelte

src/lib/parameters.ts

src/routes/$layout.svelte

src/routes/parameters/[parameter].svelte

src/routes/parameters/index.svelte