Remove more context variables and better copy to clipboard

src/lib/calculations.svelte.ts

src/lib/clipboard.ts

src/lib/components/BudgetSimulationSharingModal.svelte

src/lib/components/CopyClipboard.svelte

src/lib/components/ReadMore.svelte

src/lib/components/TestCaseSimulationSharingModal.svelte

src/lib/components/WaterfallPlainView.svelte

src/lib/components/transverse_pages/AnchorTitle.svelte

src/lib/components/transverse_pages/OpenGraph.svelte

src/lib/components/variables/VariableHeader.svelte

...mponents/variables/VariableReferredParameterHeader.svelte

src/lib/shared.svelte.ts

src/routes/+layout.svelte

src/routes/+page.svelte

src/routes/accueil/+page.svelte

src/routes/fonctionnement/+page.svelte

src/routes/parameters/[parameter]/+page.svelte

src/routes/parameters/[parameter]/edit/+page.svelte

src/routes/variables/[variable]/xlsx/+page.svelte