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>

.github/workflows/__lockfile__.yml

@@ -38,3 +38,5 @@ jobs:
       uses: gradle/actions/dependency-submission@50e97c2cd7a37755bbfafc9c5b7cafaece252f6e # v6
     - name: gradle/actions/setup-gradle@v5
       uses: gradle/actions/setup-gradle@0723195856401067f7a2779048b490ace7a47d7c # v5
+    - name: ilammy/msvc-dev-cmd@v1
+      uses: ilammy/msvc-dev-cmd@0b201ec74fa43914dc39ae48a89fd1d8cb592756 # v1