feat(components): add CustomAmountEditor, bump to 0.2.0

Extract the shared presets-plus-custom editor card — tonal surface with the
connected shape, an optional single-choice unit toggle, and an amount field
with a live preview + confirm — used by the reminder, agenda-range and snooze
pickers into one reusable, presentational component.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

build.gradle.kts

@@ -10,5 +10,5 @@ plugins {
 
 subprojects {
     group = "de.jeanlucmakiola.floret"
-    version = "0.1.0"
+    version = "0.2.0"
 }