Merge pull request #26 from JunggiKim/docs/readme-reorder-and-tone

docs: reorder Quick Start before Installation, add friendly tone

Author: JunggiKim

README.md

@@ -35,8 +35,37 @@ public void createUser(NonBlankString name, PositiveInt age, NonEmptyList<String
 
 Types replace scattered `if`-checks. Invalid data cannot even reach your method.
 
+## Quick Start
+
+```java
+import io.github.junggikim.refined.refined.numeric.PositiveInt;
+import io.github.junggikim.refined.refined.string.NonBlankString;
+import io.github.junggikim.refined.refined.collection.NonEmptyList;
+import io.github.junggikim.refined.validation.Validation;
+import io.github.junggikim.refined.violation.Violation;
+import java.util.Arrays;
+
+// of() returns Validation — never throws
+Validation<Violation, PositiveInt> age = PositiveInt.of(18);
+Validation<Violation, NonBlankString> name = NonBlankString.of("Ada");
+Validation<Violation, NonEmptyList<String>> tags =
+    NonEmptyList.of(Arrays.asList("java", "fp"));  // or List.of() on Java 9+
+
+// combine results
+Validation<Violation, String> summary =
+    name.zip(age, (n, a) -> n.value() + " (" + a.value() + ")");
+
+// unsafeOf() throws on invalid input — use at trusted boundaries
+PositiveInt confirmedAge = PositiveInt.unsafeOf(18);
+```
+
 ## Installation
 
+> *"I can just implement this myself. Why add a dependency?"*
+>
+> Totally fair! Copy the source into your project — it's MIT licensed.
+> But if it saved you some time... give me a ⭐ 🥺
+
 Published to [Maven Central](https://central.sonatype.com/artifact/io.github.junggikim/java-refined). Kotlin/JVM users can optionally add `java-refined-kotlin` for extension functions (adds `kotlin-stdlib` dependency).
 
 ### Gradle Kotlin DSL
@@ -60,30 +89,6 @@ dependencies {
 </dependency>
 ```
 
-## Quick Start
-
-```java
-import io.github.junggikim.refined.refined.numeric.PositiveInt;
-import io.github.junggikim.refined.refined.string.NonBlankString;
-import io.github.junggikim.refined.refined.collection.NonEmptyList;
-import io.github.junggikim.refined.validation.Validation;
-import io.github.junggikim.refined.violation.Violation;
-import java.util.Arrays;
-
-// of() returns Validation — never throws
-Validation<Violation, PositiveInt> age = PositiveInt.of(18);
-Validation<Violation, NonBlankString> name = NonBlankString.of("Ada");
-Validation<Violation, NonEmptyList<String>> tags =
-    NonEmptyList.of(Arrays.asList("java", "fp"));  // or List.of() on Java 9+
-
-// combine results
-Validation<Violation, String> summary =
-    name.zip(age, (n, a) -> n.value() + " (" + a.value() + ")");
-
-// unsafeOf() throws on invalid input — use at trusted boundaries
-PositiveInt confirmedAge = PositiveInt.unsafeOf(18);
-```
-
 ## Kotlin Support
 
 Optional module with Kotlin-idiomatic extensions: