Added locale date and ordinalize support for special words

Necessary to match link:https://shopify.github.io/liquid/filters/date[Liquid Date] behavior where you can use special words (i.e. "now" or "today") to equate to `Time.now`.

The specs use regular expressions because we are dealing with relative dates which would cause build failures if using exact string matches.

Milestone: minor

lib/trmnl/liquid/filters.rb

@@ -151,6 +151,7 @@ module TRMNL
 
       def to_time value
         case value
+          when "now", "today" then Time.now
           when Integer then Time.at(value)
           else Time.parse value
         end

spec/trmnl/liquid/filters_spec.rb

@@ -171,6 +171,16 @@ RSpec.describe TRMNL::Liquid::Filters do
   end
 
   describe "#l_date" do
+    it "answers now as date/time" do
+      content = renderer.call %({{ "now" | l_date: "%Y-%m-%d" }}), {}
+      expect(content).to match(/\d{4}-\d{2}-\d{2}/)
+    end
+
+    it "answers today as date/time" do
+      content = renderer.call %({{ "today" | l_date: "%Y-%m-%d" }}), {}
+      expect(content).to match(/\d{4}-\d{2}-\d{2}/)
+    end
+
     it "answers UNIX timestamp as date/time" do
       content = renderer.call %({{ 1770134949 | l_date: "%Y %b" }}), {}
       expect(content).to eq("2026 Feb")
@@ -297,6 +307,16 @@ RSpec.describe TRMNL::Liquid::Filters do
   end
 
   describe "#ordinalize" do
+    it "answers now as date/time" do
+      content = renderer.call %({{ "now" | ordinalize: "%B <<ordinal_day>>" }}), {}
+      expect(content).to match(/[a-zA-Z]+ \d+[a-z]{2}/)
+    end
+
+    it "answers today as date/time" do
+      content = renderer.call %({{ "today" | ordinalize: "%B <<ordinal_day>>" }}), {}
+      expect(content).to match(/[a-zA-Z]+ \d+[a-z]{2}/)
+    end
+
     it "answers UNIX timestamp as date/time" do
       content = renderer.call %({{ 1770134949 | ordinalize: "%A, %B <<ordinal_day>>, %Y" }}), {}
       expect(content).to eq("Tuesday, February 3rd, 2026")