ci(test): add manual trigger option to test workflow

[DariuszPorowski]

📥 Pull Request

❓ What are you trying to address

This pull request includes updates to the GitHub Actions workflow and the README.md file to enhance project documentation and workflow capabilities.

✨ Description of new changes

Documentation updates:

• README.md: Added a badge for the test workflow to provide a quick visual indication of the test status.

Workflow enhancements:

• .github/workflows/test.yml: Added the workflow_dispatch trigger to allow manual triggering of the workflow.

[github-actions]

Package	Line Rate	Complexity	Health
github.com/microsoft/terraform-provider-fabric/internal/auth	74%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/framework/customtypes	75%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/framework/planmodifiers	62%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/framework/typeutils	63%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/functions	72%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/pkg/fabricitem	80%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/pkg/transforms	62%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/pkg/utils	65%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/provider	86%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/provider/config	100%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/provider/utils	70%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/capacity	87%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/dashboard	100%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/datamart	100%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/datapipeline	100%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/domain	41%	0	➖
github.com/microsoft/terraform-provider-fabric/internal/services/environment	86%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/eventhouse	84%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/eventstream	100%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/kqldatabase	78%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/kqlqueryset	100%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/lakehouse	82%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/mirroredwarehouse	100%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/mlexperiment	100%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/mlmodel	100%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/notebook	100%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/paginatedreport	100%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/report	100%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/semanticmodel	100%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/spark	74%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/sparkjobdefinition	100%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/sqlendpoint	100%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/warehouse	84%	0	✔
github.com/microsoft/terraform-provider-fabric/internal/services/workspace	78%	0	✔
Summary	74% (3593 / 4881)	0	✔

Minimum allowed line rate is 40%

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (main@87162c3). Learn more about missing BASE report.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #38   +/-   ##
=======================================
  Coverage        ?   77.63%           
=======================================
  Files           ?      130           
  Lines           ?    12128           
  Branches        ?        0           
=======================================
  Hits            ?     9416           
  Misses          ?     2708           
  Partials        ?        4           

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[hattan]

LGTM