feat(text): Text.to_float; a void function's return <value> is an error

Text.to_float reads a leading decimal number (strtod), the twin of Text.to_int, for data files.
A return with a value in a function that returns nothing now says so where it is, instead of
reaching clang as 'store void'. Seed regenerated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

changes/text-to-float.md

@@ -0,0 +1,5 @@
+bump: minor
+type: feat
+**`Text.to_float(s)`** - a leading decimal number read from a string as a `float` (`strtod`
+underneath), the twin of `Text.to_int`. A game's data files carry fractions - an effect's
+strength, a model's reach - and there was no way to read one back.

changes/void-return-error.md

@@ -0,0 +1,5 @@
+bump: patch
+type: fix
+**`return <value>` in a function that returns nothing is an error.** It used to reach clang as
+`store void`, which fails the link with an LLVM message about void types and no line in the
+program; it now says where, in words.