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.

build-logic/convention/src/main/kotlin/com/example/architecture/convention/AndroidUnitTestConventionPlugin.kt

@@ -11,7 +11,7 @@ import org.gradle.kotlin.dsl.withType
  * shared `unit-test` toolset (JUnit Jupiter, kotlinx-coroutines-test, Turbine, AssertK).
  *
  * Deliberately does NOT use the `de.mannodermaus.android-junit5` Gradle plugin: its 1.11.x line
- * targets AGP 8.x and we build on AGP 9.0. It isn't needed for *local* unit tests anyway —
+ * targets AGP 8.x and we build on AGP 9.0. It isn't needed for *local* unit tests anyway -
  * `com.android.build.gradle.tasks.factory.AndroidUnitTest` extends Gradle's [Test] task, so calling
  * `useJUnitPlatform()` on it is enough (this mirrors `DomainModuleConventionPlugin`, which does the
  * same for pure-JVM modules).

build-logic/convention/src/main/kotlin/com/example/architecture/convention/ComposeConventionPlugin.kt

@@ -27,7 +27,7 @@ class ComposeConventionPlugin : Plugin<Project> {
 
         dependencies {
             // `implementation` (not api): every Compose consumer applies this convention itself, so
-            // Compose must NOT leak transitively — that keeps the UI-agnostic presentation module
+            // Compose must NOT leak transitively - that keeps the UI-agnostic presentation module
             // (which depends on core:presentation) free of Compose.
             val bom = platform(libs.findLibrary("androidx-compose-bom").get())
             add("implementation", bom)