[Governance] New GTFS Schedule Governance Proposal

.github/PULL_REQUEST_TEMPLATE.md

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+***REPLACE ALL THE TEXT IN (PARENTHESES) WITH YOUR OWN. USE THIS TEMPLATE AS A REFERENCE AND MODIFY AND REMOVE SECTIONS TO BEST FIT YOUR PROPOSAL***
+
+## TL;DR
+*(Provide a brief summary of this proposal and the changes it introduces.)* 
+
+## Describe the Problem
+*(Describe what you are trying to achieve. If this is linked to an existing issue, please provide the issue link.)* 
+
+## Use Cases
+*(Share examples of the scenarios you want the proposal to address, e.g., GTFS-Fares v2 makes it possible to display the cost of a monthly pass. Include visuals of how this change will appear to riders, if applicable.)*
+
+## Proposed Solution
+*(Provide a clear and concise description of the intended change.)*
+
+## Type of change
+
+*Please select the relevant change type.*
+
+GTFS Schedule
+- [ ] Functional Change
+- [ ] Non-Functional Change
+- [ ] Documentation Maintenance
+
+GTFS Realtime
+- [ ] Specification Change
+- [ ] Specification Change (Experimental Field)
+
+## Additional Information
+*(Include any relevant background, context, or supporting details that may help reviewers understand the rationale behind this proposal. This could include links to discussions, technical documentation, or related proposals.)*
+
+## Proposed Discussion Period
+*(Please specify a minimum estimated discussion period length based on the scope of the proposed change.* 
+- *Example: “I recommend reserving at least one month for discussion to ensure everyone has sufficient time to discuss the proposal.”)*
+
+## Testing Details
+*(If applicable, confirm the identity of the Consumer(s) and Producer(s) who will test the changes in the Pull Request comment section and document them below.)*
+
+- Consumer(s): *(List the entities that will consume the data and test the proposed change.)*
+- Producer(s): *(List the entities that will produce the data and test the proposed change.)*
+- Estimated Testing Period: *(Specify the duration for testing.)*
+
+## Proposal Update Tracker 
+*(Track changes to this Pull Request post over time, including edits and updates to the proposal. Regularly update this section to summarize major points discussed in the PR, ensuring a clear record of key decisions and modifications.)*
+
+| Date       | Update Description |
+|------------|--------------------|
+| (YYYY-MM-DD) | (Brief description of the update) |
+
+## Checklist
+
+- [ ] I have read and understood the GTFS Change Process.
+- [ ] I have read and understood the GTFS Guiding Principles. 
+- [ ] I understand the Role of Advocate and the Responsibilities attached to it. 
+- [ ] I have signed the Contributor License Agreement (CLA).
+- [ ] I have ensured that this proposal is not covered by an existing Pull Request.