change default fonts

Change them to ones that come included w/ Typst.

Closes #15, closes #9

manual.typ

@@ -152,34 +152,6 @@ The range name (or key) defines the left- and rightmost bits (e.g. `7-4` goes fr
 }
 ```
 
-=== Start <format-start>
-
-By default, structures start at bit 0, but you may want to number bits from 1, or another arbitrary value. To do this, you can set the `start` property of a structure to the desired start value. For example,
-
-```json
-"main": {
-  "bits": 8,
-  "start": 4,
-  "ranges": {
-    "11-7": { ... },
-    "6-4": { ... }
-  }
-}
-```
-
-#let start-schema = (structures: (main: (bits: 8, start: 4, ranges: ("11-7": (name: ""), "6-4": (name: "")))))
-
-would render as
-
-#align(
-  center,
-  schema.render(
-    schema.load(start-schema),
-    width: 50%
-  )
-)
-
-
 == Range <format-range>
 
 A range represents a group of consecutive bits. It can have a name (displayed in the bit cells), a description (displayed under the structure) and / or values.

src/renderer.typ

@@ -387,10 +387,8 @@
   }
   let range-boundaries = ()
   for r in struct.ranges.values() {
-    let start-i = to-real-i(if config.ltr-bits {r.start} else {r.end})
-    let end-i = to-real-i(if config.ltr-bits {r.end} else {r.start}) + 1
-    range-boundaries.push(start-i)
-    range-boundaries.push(end-i)
+    let i = to-real-i(if config.ltr-bits {r.start} else {r.end})
+    range-boundaries.push(i)
   }
 
   // Draw colors