Experiments initial setup

.github/CODEOWNERS

@@ -16,3 +16,6 @@ trace-protobuf          @Datadog/serverless
 trace-mini-agent        @Datadog/serverless
 trace-utils             @Datadog/serverless
 serverless              @Datadog/serverless
+
+# no default owners
+experimental/           

.github/workflows/experiments-lint.yml

@@ -0,0 +1,40 @@
+name: Lint experiments
+on:
+  push:
+    paths:
+      - 'experimental/**' # Only run action when experiments have changed
+
+defaults:
+  run:
+    working-directory: ./experimental
+
+env: 
+  CARGO_TERM_COLOR: always
+
+jobs:
+  rustfmt:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+      - name: Cache
+        uses: ./.github/actions/cache
+      - name: Install latest nightly toolchain and rustfmt
+        run: rustup update nightly && rustup default nightly && rustup component add rustfmt
+  clippy:
+    name: "clippy #${{ matrix.rust_version }}"
+    strategy:
+      fail-fast: false
+      matrix:
+        rust_version: ["stable"]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+      - name: Cache
+        uses: ./.github/actions/cache
+        with:
+          rust_version: ${{ matrix.rust_version }}
+      - name: Install ${{ matrix.version }} toolchain and clippy
+        run: rustup install ${{ matrix.rust_version }} && rustup default ${{ matrix.rust_version }} && rustup component add clippy
+      - run: cargo clippy --all-targets --all-features -- -D warnings

.github/workflows/experiments-test.yml

@@ -0,0 +1,42 @@
+name: Test experiments
+on:
+  push:
+    paths:
+      - 'experimental/**' # Only run action when experiments have changed
+
+defaults:
+  run:
+    working-directory: ./experimental
+
+env: 
+  CARGO_TERM_COLOR: always
+
+jobs:
+  test:
+    name: "cargo test --workspace #${{ matrix.platform }} ${{ matrix.rust_version }}"
+    runs-on: ${{ matrix.platform }}
+    strategy:
+      matrix:
+        platform: [windows-latest, ubuntu-latest, macos-12]
+        rust_version: [""]
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+      - name: Cache
+        uses: ./.github/actions/cache
+        with:
+          rust_version: ${{ matrix.rust_version }}
+      - name: Install Rust ${{ matrix.rust_version }}
+        if: ${{ matrix.rust_version != '' }}
+        run: rustup install ${{ matrix.rust_version }} && rustup default ${{ matrix.rust_version }}
+      - id: rust-version
+        run: echo "version=$(rustc --version)" >> $GITHUB_OUTPUT
+      - name: "[${{ steps.rust-version.outputs.version}}] cargo build --workspace --verbose"
+        run: cargo build --workspace --verbose
+      - name: "[${{ steps.rust-version.outputs.version}}] cargo test --workspace --verbose"
+        run: cargo test --workspace --verbose
+        env:
+          RUST_BACKTRACE: 1
+
+
+

experimental/README.md

@@ -0,0 +1,26 @@
+# Shared library experiments and POC
+
+In past a lot of interesting projects have been kept eternally on a branch of libdatadog.
+
+However this has made collaboration and reuse of code within core of libdatadog harder. 
+
+As a consequences, we've discussed in the past the idea of having a semi-temporary experiments sub project within libdatadog. Where all those not yet-production ready (or meant for production) projects can live, and facilitiate code reuse and better collaboration based on Pull requests.
+
+## Rules for experiments 
+
+For now *by default* all of the projects withing `experimental` namespace should not be build alongside the full libdatadog crate, to avoid unnecessary increase of build times and the complexity of the libdatadog's CI.
+
+Experiments are free to add CI configuration as they see fit. They should however prefer to constrain the CI run only to their own folders, e.g.
+
+```
+name: Experimental CI
+on:
+  push:
+    paths:
+      - 'experimental/custom-parsing/**' # Only run action when custom parsing code has changes
+
+```
+
+To simplify the experiment setup - an experimental Cargo workspace will be created - experiments are free to add themselves to the workspace - however its not mandatory. The workspace purpose will mostly be relegeated to CI automations.
+
+