Introduce C library for Pkl (#1238)

This uses native-image to generate a C library for Pkl.
This generated library from native-image is wrapped with our own library,
in `pkl.h`.

This produces a static and a dynamic library for each os/arch variant
that Pkl currently supports.

Co-authored-by: Kushal Pisavadia <kushal.p@apple.com>
Co-authored-by: Jen Basch <jbasch94@gmail.com>
Co-authored-by: Islon Scherer <i_desouzascherer@apple.com>

gradle/libs.versions.toml

@@ -5,6 +5,7 @@ checksumPlugin = "1.4.0"
 clikt = "5.0.3"
 commonMark = "0.29.0"
 downloadTaskPlugin = "5.7.0"
+eclipseCdtFormat = "12.2"
 errorProne = "2.50.0"
 errorPronePlugin = "5.1.0"
 geantyref = "2.0.1"
@@ -30,10 +31,12 @@ graalVmSha256-windows-aarch64 = "unavailable"
 ideaExtPlugin = "1.4.1"
 javaPoet = "0.17.0"
 javaxInject = "1"
+jextractPlugin = "1.+"
 jimfs = "1.3.1"
 jline = "4.3.1"
 jmh = "1.37"
 jmhPlugin = "0.7.3"
+jna = "5.19.1"
 jspecify = "1.0.0"
 junit = "6.1.1"
 # 1.7+ generates much more verbose code
@@ -84,6 +87,8 @@ jimfs = { group = "com.google.jimfs", name = "jimfs", version.ref = "jimfs" }
 jlineReader = { group = "org.jline", name = "jline-reader", version.ref = "jline" }
 jlineTerminal = { group = "org.jline", name = "jline-terminal", version.ref = "jline" }
 jlineTerminalJni = { group = "org.jline", name = "jline-terminal-jni", version.ref = "jline" }
+jna = { group = "net.java.dev.jna", name = "jna", version.ref = "jna" }
+jnaPlatform = { group = "net.java.dev.jna", name = "jna-platform", version.ref = "jna" }
 #noinspection UnusedVersionCatalogEntry
 jspecify = { group = "org.jspecify", name = "jspecify", version.ref = "jspecify" }
 junitApi = { group = "org.junit.jupiter", name = "junit-jupiter-api", version.ref = "junit" }
@@ -134,3 +139,4 @@ nexusPublish = { id = "io.github.gradle-nexus.publish-plugin", version.ref = "ne
 #noinspection UnusedVersionCatalogEntry
 nullaway = { id = "net.ltgt.nullaway", version.ref = "nullawayPlugin" }
 shadow = { id = "com.gradleup.shadow", version.ref = "shadowPlugin" }
+jextract = { id = "de.infolektuell.jextract", version.ref = "jextractPlugin" }