Add CI workflow to publish crates on tag/release (#14)

* Add CI workflow to publish crates on tag/release

This commit adds a new github actions work to publish the package's
crates to crates.io. This new CI job run cargo publish on the respective
crates in the correct order to publish the entire workspace.

* Update package dirs after #13 and #15

* Update package dirs after #27

* Choose names that better describe actions taken

* Put list of crates to release (publish on crates.io) in topo order

---------

Co-authored-by: John Lapeyre <[email protected]>

.github/workflows/release.yml

@@ -0,0 +1,25 @@
+---
+name: Release openqasm3_parser
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  publish_crates:
+    name: Publish openqasm3_parser crates
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        crate: [oq3_lexer, oq3_parser, oq3_syntax, oq3_source_file, oq3_semantics]
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - name: Run cargo publish
+        run: |
+          cd crates/${{ matrix.crate }}
+          cargo publish
+        env:
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}