DBOS CLI (#105)

- Add a CLI for workflow management and convenient
start/migrate/postgres utilities
- Update releaser program such that it 1) compiles the CLI against a few
common architectures and 2) attach these as assets to the release

# Usage
<img width="650" height="352" alt="Screenshot 2025-09-03 at 09 56 44"
src="https://github.com/user-attachments/assets/cbed1460-00a3-4853-9871-59b45c189c9e"
/>



# CLI installation

- Manually by downloading the asset from github
- Running `go install github.com/dbos-inc/dbos-transact-golang/cmd/dbos`
(note that the version, e.g. `@latest`, has to be specified if running
go install outside of a go project)

Example (go install and local dev build)
<img width="733" height="92" alt="Screenshot 2025-09-03 at 09 51 04"
src="https://github.com/user-attachments/assets/ba16968a-ca51-4071-bb23-fecf1ee36ed6"
/>

<img width="843" height="92" alt="Screenshot 2025-09-03 at 09 51 22"
src="https://github.com/user-attachments/assets/bf9cd879-c824-497c-b230-dfad141d9f1a"
/>


# Output format

The CLI has a global `--json` flag, e.g.:
<img width="728" height="476" alt="Screenshot 2025-09-03 at 09 55 28"
src="https://github.com/user-attachments/assets/620f89f6-9945-4695-b860-7daeb2461e1e"
/>


# Notes
- `reset` destroy / recreates the target database, but does not perform
any migration. Migrations will be applied next time a DBOS context is
created against that database.
- `init` bootstraps a `dbos-toolbox` application

Author: maxdml

.github/workflows/tests.yml

@@ -65,4 +65,11 @@ jobs:
       working-directory: ./dbos
       env:
         PGPASSWORD: a!b@c$d()e*_,/:;=?@ff[]22
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Run CLI tests
+      run: go vet ./... && gotestsum --format github-action -- -race -v -count=1 ./...
+      working-directory: ./cmd/dbos
+      env:
+        PGPASSWORD: a!b@c$d()e*_,/:;=?@ff[]22
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}