feat(datasheet): add typst datasheet flow

This is a squash of 5 commits in order to add the new datasheet flow.

fix(datasheet): ensure datasheet can use images properly

fix(datasheet): white page when funding was not specified

This was caused by creating a page before first checking whether there was any content for that page beforehand, so it would result in a rogue white page with no content.

fix(datasheet): missing analog pin tables

fix(datasheet): tweak pandoc settings

Switching from `gfm` to `markdown` should enable more formatting options. The extensions have been configured to be similar to `gfm` but provide some additional things, like `line_blocks` and `lists_without_preceding_blankline`s.

docs/typst/chapters/call-to-action.typ

@@ -0,0 +1,52 @@
+#import "../src/lib.typ": annotated_qrcode
+
+#let call_to_action_page(qrcode_colour: black) = [
+  #align(center)[
+    #heading(level: 1)[Where is #emph(underline("your")) design?]
+    *Go from idea to chip design in minutes, without breaking the bank.*
+  ]
+
+  Interested and want to get your own design manufactured? Visit our website and
+  check out our educational material and previous submissions!
+
+  #align(center, heading(level: 2, outlined: false)[How?])
+  New to this? Use our basic Wokwi template to see what's possible. If you're ready for more,
+  use our advanced Wokwi template and unlock some extra pins.
+
+  Know Verilog and CocoTB? Get stuck in with our HDL templates.
+
+  #align(center, heading(level: 2, outlined: false)[When?])
+  Multiple shuttles are run per year, meaning you've got an opportunity to manufacture your design
+  at any time.
+
+  #align(center, heading(level: 2, outlined: false)[Stuck? Need help? Want inspiration?])
+  Come chat to us and our community on Discord! Scan the QR code below.
+
+  #v(1cm)
+  #grid(
+    columns: (1fr, 1fr, 1fr),
+    rows: 1,
+    column-gutter: 1em,
+    align: center,
+    inset: 8pt,
+    fill: white,
+
+    annotated_qrcode(
+      "https://tinytapeout.com", 
+      "Website", 
+      tiaoma_args: ("scale": 2.0, "fg-color": qrcode_colour)
+    ),
+
+    annotated_qrcode(
+      "https://tinytapeout.com/digital_design", 
+      "Digital design guide", 
+      tiaoma_args: ("scale": 1.75, "fg-color": qrcode_colour)
+    ),
+
+    annotated_qrcode(
+      "https://tinytapeout.com/discord", 
+      "Discord server", 
+      tiaoma_args: ("scale": 2.0, "fg-color": qrcode_colour)
+    )
+  )
+]