feat: Make legend dynamic based on what the page uses
feat: Make legend dynamic based on what the page uses

See also TypeStrong/typedoc#1187
sebastian-lenz/typedoc-default-themes,TypeStrong/typedoc-default-themes,sebastian-lenz/typedoc-default-themes,TypeStrong/typedoc-default-themes,TypeStrong/typedoc-default-themes,sebastian-lenz/typedoc-default-themes