[staticwebapp] Add Static Web App extension

[StrawnSC]

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This checklist is used to make sure that common guidelines for a pull request are followed.

Related command

General Guidelines

• Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally?

For new extensions:

• My extension description/summary conforms to the Extension Summary Guidelines.

About Extension Publish

There is a pipeline to automatically build, upload and publish extension wheels.
Once your pull request is merged into main branch, a new pull request will be created to update src/index.json automatically.
The precondition is to put your code inside this repository and upgrade the version in the pull request but do not modify src/index.json.

[yonzhan]

staticwebapp

[yanzhudd]

It is better to point out what types are supported.

[StrawnSC]

Thanks for the suggestion, just added that

[zhoxing-ms]

vcr.errors.CannotOverwriteExistingCassetteException: Can't overwrite existing cassette ('/mnt/vss/_work/1/s/src/staticwebapp/azext_staticwebapp/tests/latest/recordings/test_staticwebapp_dbconnection_azure_sql.yaml') in your current record mode ('once').
No match for the request (<Request (PUT) https://management.azure.com/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/cli_test000001/providers/Microsoft.Sql/servers/cli-test000003?api-version=2022-08-01-preview>) was found.
Found 1 similar requests with 1 different matcher(s) :

1 - (<Request (PUT) https://management.azure.com/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/cli_test000001/providers/Microsoft.Sql/servers/cli-test000003?api-version=2021-02-01-preview>)..)
Matchers succeeded : ['method', 'scheme', 'host', 'port', 'path']
Matchers failed :
_custom_request_query_matcher - assertion failure :
None

I see that the CI pipeline of this PR failed due to the inconsistent api-version of Microsoft.Sql. Could you please re-record these failed test cases?

[azclibot]

[Release] Update index.json for extension [ staticwebapp ] : https://dev.azure.com/azclitools/internal/_build/results?buildId=41438&view=results