Initial implementation of songbook toolset

Kotlin/JVM multi-module project for generating a scout songbook PDF
from ChordPro-format text files. Includes ChordPro parser, layout engine
with greedy spread packing for double-page songs, OpenPDF renderer,
CLI (Clikt), Compose Desktop GUI, and 5 sample songs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

parser/build.gradle.kts

@@ -0,0 +1,13 @@
+plugins {
+    id("songbook-conventions")
+}
+
+dependencies {
+    implementation(project(":model"))
+    implementation("com.fasterxml.jackson.core:jackson-databind:2.18.3")
+    implementation("com.fasterxml.jackson.module:jackson-module-kotlin:2.18.3")
+    implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:2.18.3")
+
+    testImplementation(kotlin("test"))
+    testImplementation("io.kotest:kotest-assertions-core:5.9.1")
+}