feat: Implemenet Async Graph API (#23)

* Midway there

* Midway there

* Async works

* Some fixes etc

* Hide behind cfg test

* No need in connection

* Final touches

* Tokio no longer default, removed lock from tx

* merge use

* Spawn the return_to_pool command

* Use enum for typemarker

* Fenced code blank line

* Update toml

.github/workflows/main.yml

@@ -41,7 +41,7 @@ jobs:
       - uses: taiki-e/install-action@cargo-llvm-cov
       - uses: taiki-e/install-action@nextest
       - name: Generate Code Coverage
-        run: cargo llvm-cov nextest --all --codecov --output-path codecov.json
+        run: cargo llvm-cov nextest --all --features tokio --codecov --output-path codecov.json
       - name: Upload coverage reports to Codecov
         uses: codecov/codecov-action@v4
         with:

.github/workflows/pr-checks.yml

@@ -52,7 +52,7 @@ jobs:
       - name: Populate test graph
         run: pip install falkordb && ./resources/populate_graph.py
       - name: Test
-        run: cargo nextest run --all
+        run: cargo nextest run --all --features tokio
     services:
       falkordb:
         image: falkordb/falkordb:edge