Add changelog for Gradle plugin

Author: egorikftp

tools/gradle-plugin/CHANGELOG.md

@@ -0,0 +1,76 @@
+# Gradle plugin changelog
+
+## [0.2.0] - 2025-12-08
+
+### Added
+
+- Introduce separate code style configuration for generated code
+
+Breaking changes:
+
+1. `useExplicitMode` and `indentSize` moved from `imageVector` into `codeStyle` block because they will be reused for
+   icon pack generation as well
+
+```kotlin
+valkyrie {
+// Optional: Code style configuration for generated code
+  codeStyle {
+    // Add explicit `public` modifier to generated declarations (default: false)
+    useExplicitMode = false
+
+    // Number of spaces used for each level of indentation in generated code (default: 4)
+    indentSize = 4
+  }
+}
+```
+
+- Introduce iconpack generation and configuration
+
+Breaking changes:
+
+1. `iconPackName` and `nestedPackName` options removed and replaced them with a dedicated `iconPack`
+   and `nested` blocks
+2. `useFlatPackage` moved into `iconPack` block
+
+For more details,
+see [documentation](https://github.com/ComposeGears/Valkyrie/tree/gradle-plugin-0.2.0?tab=readme-ov-file#gradle-plugin).
+
+For simple icon pack generation, you can use the following configuration:
+
+```kotlin
+valkyrie {
+  packageName = "com.example.app.icons"
+
+  iconPack {
+    name = "ValkyrieIcons"
+    targetSourceSet = "commonMain" // icon pack object will be generated in commonMain source set
+  }
+}
+```
+
+For nested icon packs, you can define multiple `nested` icon packs within the `iconPack` block:
+
+```kotlin
+valkyrie {
+  packageName = "com.example.app.icons"
+
+  iconPack {
+    name = "ValkyrieIcons"
+    targetSourceSet = "commonMain" // icon pack object will be generated in commonMain source set
+
+    nested {
+      name = "Outlined"
+      sourceFolder = "outlined"
+    }
+
+    nested {
+      name = "Filled"
+      sourceFolder = "filled"
+    }
+  }
+}
+```
+
+## [0.1.0] - 2025-11-30
+
+- Initial release of Valkyrie Gradle plugin