feat: dynamically generate background color for category links (#1225)

* chore: add +x to run.sh

* feat: dynamically generate background color for category links using hash

* feat: allow category styles to be overridden by term parameters

* refactor: remove default tag background and color variables

layouts/partials/helper/color-from-str.html

@@ -0,0 +1,13 @@
+{{/* 
+    This helper is used to generate a background color and text color from a string
+    Used to generate deterministic colors for tags, categories, etc.
+*/}}
+
+{{- $str := . -}}
+{{- $hash := hash.FNV32a $str -}}
+{{- $h := mod $hash 360 -}}
+
+{{- $backgroundColor := printf "hsl(%d, 60%%, 84%%)" $h -}}
+{{- $textColor := printf "hsl(%d, 60%%, 15%%)" $h -}}
+
+{{- return dict "BackgroundColor" $backgroundColor "TextColor" $textColor "Hue" $h -}}