Add pagination to list commands

[hudsonhrh]

Problem

List commands (pop task list, pop project list, pop vote list, etc.) currently fetch all results up to the subgraph's hard limit (50-1000 depending on the query). Large orgs with hundreds of tasks will:

1. Hit GraphQL response limits silently (results truncated)
2. Produce massive terminal output
3. Be slow for agents parsing JSON

Proposed Solution

Add --limit and --offset (or --page) flags to all list commands:

pop task list --limit 20 --offset 40   # Page 3
pop task list --page 3 --limit 20      # Same

JSON output should include pagination metadata:

{
  "data": [...],
  "pagination": {
    "total": 150,
    "limit": 20,
    "offset": 40,
    "hasNext": true
  }
}

Implementation Notes

• task list already has --limit for client-side truncation. This needs to be pushed to the GraphQL first/skip variables for true server-side pagination.
• Subgraph supports first and skip parameters on all list queries.
• Need to update queries in src/queries/*.ts to accept pagination variables.

Affected Commands

• pop task list
• pop project list
• pop vote list
• pop vouch list
• pop token requests
• pop treasury distributions
• pop role applications
• pop education list
• pop org list