docs: Send Data Alloy page + Interactive Examples

[Jayclifford345]

This PR updates the send-data section of the documentation with an Alloy introduction and examples directory. Each of the examples are written as interactive sandboxes using the documentation found here:
https://github.com/grafana/killercoda/blob/staging/docs/transformer.md

Note this PR also includes a new writers shortcut

{{< docs/ignore >}}
{{/< docs/ignore >}}

Here are the Interactive sandboxes auto-generated from the docs:

• https://killercoda.com/grafana-dev-testing/course/loki/alloy-otel-logs
• https://killercoda.com/grafana-dev-testing/course/loki/alloy-kafka-logs

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Documentation contains interactive example
• Tests updated
• Title matches the required conventional commits format, see here
  • Note that Promtail is considered to be feature complete, and future development for logs collection will be in Grafana Alloy. As such, feat PRs are unlikely to be accepted unless a case can be made for the feature actually being a bug fix to existing behavior.
• Changes that require user attention or interaction to upgrade are documented in docs/sources/setup/upgrade/_index.md
• For Helm chart changes bump the Helm chart version in production/helm/loki/Chart.yaml and update production/helm/loki/CHANGELOG.md and production/helm/loki/README.md. Example PR
• If the change is deprecating or removing a configuration option, update the deprecated-config.yaml and deleted-config.yaml files respectively in the tools/deprecated-config-checker directory. Example PR

[Jayclifford345]

@JStickler I think it's all ready for your review! No rush at all on this. Let me know if any of the new syntax doesn't make sense I can clear it up

[JStickler]

Ran through both tutorials in KillerCoda, but most of my comments are on the Kafka file, even though they apply to both.
Let me know if you have any questions. Nice job on this!

[Jayclifford345]

Hey @JStickler! I added this section to make the language more consistent in opening the configuration file. I have also updated the dev-testing versions of the Killercoda sandboxes to match these changes:
https://killercoda.com/grafana-dev-testing/course/loki/alloy-otel-logs
https://killercoda.com/grafana-dev-testing/course/loki/alloy-kafka-logs

Let me know what you think, many thanks again! Sorry if I missed any of your spelling changes in the other page I think I got them all though

[JStickler]

Almost there!

[Jayclifford345]

Thanks @JStickler ! That should be those changes added. I have also regenerated the Sandboxes aswell :).

[JStickler]

[docs team] LGTM

[grafanabot]

This PR must be merged before a backport PR will be created.

[grafanabot]

This PR must be merged before a backport PR will be created.