Update source code `Kind` to `Type`. It's only changes within our code.
Changes to yaml tag (that will affect users) will be done in later PRs.
This is a breaking change since it updates telemetry's span attribute
from `source_kind` to `source_type`.
Related #817
Future updates will include:
* Updating a preprocessing function to convert config file from v1 to v2
* Update unmarshal function for ToolsFile to convert config file (test
will fail since the yaml tag is not yet updated).
* Update yaml tag (test will pass).
## Description
---
This pull request introduces a new tool, cloud-sql-create-users, which
allows for the creation of both built-in and IAM users in a Cloud SQL
instance.
<img width="518" height="846" alt="image"
src="https://github.com/user-attachments/assets/2f96f0be-658b-46d1-9de6-f47db2804274"
/>
<img width="518" height="956" alt="image"
src="https://github.com/user-attachments/assets/2a7d80d4-eab2-4e91-b08b-5fb78c150319"
/>
## PR Checklist
---
> Thank you for opening a Pull Request! Before submitting your PR, there
are a
> few things you can do to make sure it goes smoothly:
- [x] Make sure you reviewed
[CONTRIBUTING.md](https://github.com/googleapis/genai-toolbox/blob/main/CONTRIBUTING.md)
- [x] Make sure to open an issue as a
[bug/issue](https://github.com/googleapis/genai-toolbox/issues/new/choose)
before writing your code! That way we can discuss the change, evaluate
designs, and agree on the general idea
- [ ] Ensure the tests and linter pass
- [ ] Code coverage does not decrease (if any source code was changed)
- [x] Appropriate docs were updated (if necessary)
- [ ] Make sure to add `!` if this involve a breaking change
🛠️ Fixes #<issue_number_goes_here>
