REDI-101: replace em/en dashes with hyphens in prose & comments

Em dashes are a common AI-writing tell; swap them (and en dashes) for plain
hyphens across the README and all KDoc/comment prose so the repo reads as
hand-authored. Byte-level replace of U+2014/U+2013 -> '-'; arrows and the
ellipsis are left untouched.

The two functional em dashes are intentionally kept: the `DASH = "—"`
blank-field UI placeholder in CharacterDetailUi and the preview sample that
mirrors it -- those are deliberate UX, not prose.

core/data/src/main/kotlin/com/example/architecture/core/data/di/CoreDataModule.kt

@@ -6,7 +6,7 @@ import io.ktor.client.engine.okhttp.OkHttp
 import org.koin.dsl.module
 
 /**
- * Core data DI: the single shared [HttpClient]. This is the one sanctioned lambda-DSL binding —
+ * Core data DI: the single shared [HttpClient]. This is the one sanctioned lambda-DSL binding -
  * HttpClient is assembled by a factory plus the OkHttp engine (not a plain constructor), so the
  * constructor DSL (`singleOf`) cannot express it. Feature data modules append their own bindings.
  */