Issue #429: Add CDC as funder via logo and in DESCRIPTION

DESCRIPTION

@@ -14,7 +14,9 @@ Authors@R:
     person(given = "Sam Abbott",
            role = c("aut"),
            email = "[email protected]",
-           comment = c(ORCID = "0000-0001-8057-8037")))
+           comment = c(ORCID = "0000-0001-8057-8037")),
+    person(given = "CDC",
+           role = c("fnd")))
 Description: Understanding and accurately estimating epidemiological delay
     distributions is important for public health policy. These estimates
     directly influence epidemic situational awareness, control strategies, and resource allocation. In this package, we provide methods to address the key challenges in estimating these distributions, including truncation, interval censoring, and dynamical biases. Despite their importance, these issues are frequently overlooked, often resulting in biased conclusions.

_pkgdown.yml

@@ -27,6 +27,9 @@ authors:
     href: "https://athowes.github.io/"
   Sam Abbott:
     href: "https://www.samabbott.co.uk/"
+  CDC:
+    href: "https://www.cdc.gov/"
+    html: "<img src='man/figures/cdc-logo.png' height='24' alt='CDC logo'/>"
 
 reference:
 - title: Simulation