add data_grandlyon documentation

[Crocmagnon]

Proposed change

Type of change

• Spelling, grammar or other readability improvements (current branch).
• Adjusted missing or incorrect information in the current documentation (current branch).
• Added documentation for a new integration I'm adding to Home Assistant (next branch).
  • I've opened up a PR to add logos and icons in Brands repository.
• Added documentation for a new feature I'm adding to Home Assistant (next branch).
• Removed stale or deprecated documentation.

Additional information

• Link to parent pull request in the codebase: Add Data Grand Lyon integration core#167946
• Link to parent pull request in the Brands repository: add data_grandlyon images brands#10123

Checklist

• This PR uses the correct branch, based on one of the following:
  • I made a change to the existing documentation and used the current branch.
  • I made a change that is related to an upcoming version of Home Assistant and used the next branch.
• The documentation follows the Home Assistant documentation standards.

[home-assistant]

It seems that this PR is targeted against an incorrect branch since it has a parent PR on one of our codebases. Documentation that needs to be updated for an upcoming release should target the next branch. Please change the target branch of this PR to next and rebase if needed.

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[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Adds documentation for the new data_grandlyon Home Assistant integration, covering prerequisites, configuration flow, entities, and troubleshooting.

Changes:

• Added a new integration documentation page for Data Grand Lyon.
• Documented config flow fields and sub-entry setup for transit stops and Vélo'v stations.
• Described entities, update interval, limitations, and common troubleshooting steps.

[Copilot]

required: inclusive is likely not a valid value for configuration_basic fields (the docs schema typically expects true/false). If these credentials are only needed for transit stops, set them as not required in the table and keep the conditional requirement in the description, or split the documentation to clearly indicate when credentials are required.

Suggested change

	required: inclusive
	type: string
	Password:
	description: "Your password on data.grandlyon.com. Required if you want to monitor transit stops."
	required: inclusive
	required: false
	type: string
	Password:
	description: "Your password on data.grandlyon.com. Required if you want to monitor transit stops."
	required: false

[Crocmagnon]

unclear whether this is true or not.
the docs mention required: inclusive