fix: structs can't parse json with null values (#7258)

Fixes #7257 by accepting `null` for any optional field in structs and
converting `null` to `undefined` during parsing from JSON to structs.

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- [x] Tests added (always)
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---------

Signed-off-by: monada-bot[bot] <[email protected]>
Co-authored-by: monada-bot[bot] <[email protected]>

fix: remove dev tarballs before running hangar tests (#7255)

chore: test harness interface (#7248)

Extract common logic across Terraform and AWS CDK targets when running
tests. This is an initial step towards allowing custom platforms to
provide test running capabilities.

## Checklist

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chore: extract common aws logic across cloud api (#7245)

Create base classes for all cloud API resources to share common logic
across AWS platforms

## Checklist

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guide](https://www.winglang.io/contributing/start-here/pull_requests#how-are-pull-request-titles-formatted)
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- [x] Tests added (always)
- [x] Docs updated (only required for features)
- [x] Added `pr/e2e-full` label if this feature requires end-to-end
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---------

Signed-off-by: monada-bot[bot] <[email protected]>
Co-authored-by: monada-bot[bot] <[email protected]>

fix(docs): small typos (#7243)

- Thumbs up icon not rendered
- Prefix `cloud-Queue-` fixed to `Queue-`

chore: fix sdk spec test action (#7242)

fix(sdk): cloud.Service test when using tf-aws target (#7233)

I try to run this test whit the command `wing test --platform tf-aws minimal.test.w`

```w
bring cloud;

let s = new cloud.Service(inflight () => {
  log("hello, service!");

  return () => {
    log("stopping!");
  };
});

test "start and stop" {
  assert(s.started());
  s.stop();
  assert(!s.started());
}
```

but I get this error

```shell
$ wing test --platform tf-aws minimal.test.w
✔ Compiling minimal.test.w to tf-aws...

✔ terraform init

✖ terraform apply

Command failed: terraform apply -auto-approve
╷
│ Error: creating ECS Cluster (Test.mfet8zI2Z4_cluster): InvalidParameterException: Cluster name must match ^[a-zA-Z0-9\-_]{1,255}$, but was Test.mfet8zI2Z4_cluster
│
│   with aws_ecs_cluster.Testmfet8zI2Z4_env0_Service_ECSCluster_1D77BD98,
│   on main.tf.json line 116, in resource.aws_ecs_cluster.Testmfet8zI2Z4_env0_Service_ECSCluster_1D77BD98:
│  116:       }
│
╵

✔ terraform destroy


Tests 1 failed (1)
Snapshots 1 skipped
Test Files 1 failed (1)
Duration 3m29.12s
```

When objects are generated for the test, the default is to generate the cluster name like this Test.mfet8zI2Z4_cluster. 
However, the cluster name cannot have a `.`, so I made a small adjustment to replace `.` with `_` to avoid this error


## Checklist

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- [ ] Tests added (always)
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fix(vscode): error connecting to lsp in windows (#7239)

chore: replace mergify's `queue_rules.speculative_checks` in favor of…

… `merge_queue.max_parallel_checks` (#7238)

fix(sdk): some fixes and minor refactoring (#7234)

I made two small corrections and a refactoring in this PR:

1. There was an error in an environment variable related to the bucket name that was passed in the aws-cdk build.
2. When updating the lambda function log, I assigned the new enum to the old variable, but I have now corrected it to the proper variable.
3. It didn't make sense to have a file just to keep a global variable related to the Counter, so I removed the file and moved the global variable to the shared-aws/counter.ts file.

## Checklist

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- [ ] Tests added (always)
- [ ] Docs updated (only required for features)
- [ ] Added `pr/e2e-full` label if this feature requires end-to-end testing

*By submitting this pull request, I confirm that my contribution is made under the terms of the [Wing Cloud Contribution License](https://github.com/winglang/wing/blob/main/CONTRIBUTION_LICENSE.md)*.