Add a new setting "Keep extra Supabase edge functions" that controls
whether dangling edge functions (deployed to Supabase but not in
codebase) are automatically deleted during sync operations.

When disabled (default), edge functions are pruned during batch
deployments triggered by:
- Shared module changes
- Version reverts
- Local agent file operations

Changes:
- Add skipPruneEdgeFunctions to UserSettings schema
- Add listSupabaseFunctions API method to management client
- Modify deployAllSupabaseFunctions to prune dangling functions
- Add UI toggle in SupabaseIntegration component
- Update all call sites to pass the setting

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Introduces a user setting to control pruning of Supabase edge
functions and integrates pruning into batch deployments.
> 
> - Adds `skipPruneEdgeFunctions` to `UserSettings` and a toggle in
`SupabaseIntegration`
> - Extends management client with `listSupabaseFunctions`
> - Updates `deployAllSupabaseFunctions` to optionally prune deployed
functions not in the codebase, using `deleteSupabaseFunction`;
controlled by `skipPruneEdgeFunctions`
> - Threads the setting through all batch deploy call sites: shared
module edits (`app_handlers`), version reverts (`version_handlers`),
chat/agent file ops (`response_processor`, local agent
`file_operations`)
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
6af28fb682e7a6352426e0033d67ee1e750201fc. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Adds a setting to control pruning of extra Supabase edge functions
during batch deployments. By default, dangling functions (deployed but
not in code) are pruned; enable “Keep extra Supabase edge functions” to
skip pruning.

- **New Features**
- Added skipPruneEdgeFunctions to UserSettings and a toggle in
SupabaseIntegration.
- Implemented listSupabaseFunctions API and pruning in
deployAllSupabaseFunctions.
- Passed the setting through all batch deploy paths (shared module
changes, version reverts, local agent file operations).

<sup>Written for commit 6af28fb682e7a6352426e0033d67ee1e750201fc.
Summary will update on new commits.</sup>

<!-- End of auto-generated description by cubic. -->

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---------
Co-authored-by: Claude <noreply@anthropic.com>