Add qr code support for displays (#2952)

Co-authored-by: Oxan van Leeuwen <oxan@oxanvanleeuwen.nl>

tests/test1.yaml

@@ -2154,6 +2154,7 @@ display:
     pages:
       - id: page1
         lambda: |-
+          it.qr_code(0, 0, id(homepage_qr));
           it.rectangle(0, 0, it.get_width(), it.get_height());
       - id: page2
         lambda: |-
@@ -2577,3 +2578,7 @@ select:
       - one
       - two
     optimistic: true
+
+qr_code:
+  - id: homepage_qr
+    value: https://esphome.io/index.html

tests/test3.yaml

@@ -1351,6 +1351,10 @@ daly_bms:
   update_interval: 20s
   uart_id: uart1
 
+qr_code:
+  - id: homepage_qr
+    value: https://esphome.io/index.html
+
 button:
   - platform: output
     id: output_button