Initial implementation

This adds the initial implementation of "github.com/go-json-experiment/jsonsplit"
that dynamically delegates marshal/unmarshal calls to either v1, v2, or both.

Author: dsnet

.github/workflows/ci.yml

@@ -0,0 +1,21 @@
+name: Test
+on: [push, pull_request]
+jobs:
+  test-all:
+    strategy:
+      matrix:
+        go-version: [1.24.x]
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Install Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: ${{ matrix.go-version }}
+    - name: Checkout code
+      uses: actions/checkout@v4
+    - name: Test
+      run: go test ./...
+    - name: Format
+      if: matrix.os == 'ubuntu-latest'
+      run: diff -u <(echo -n) <(gofmt -s -d .)

go.mod

@@ -0,0 +1,8 @@
+module github.com/go-json-experiment/jsonsplit
+
+go 1.24.2
+
+require (
+	github.com/go-json-experiment/json v0.0.0-20250626171732-1a886bd29d1b
+	github.com/google/go-cmp v0.7.0
+)

go.sum

@@ -0,0 +1,4 @@
+github.com/go-json-experiment/json v0.0.0-20250626171732-1a886bd29d1b h1:ooF9/NzXkXL3OOLRwtPuQT/D7Kx2S5w/Kl1GnMF9h2s=
+github.com/go-json-experiment/json v0.0.0-20250626171732-1a886bd29d1b/go.mod h1:TiCD2a1pcmjd7YnhGH0f/zKNcCD06B029pHhzV23c2M=
+github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
+github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=