Add editable organization descriptions

[realkoreanbeef]

Summary

• Add an optional organization description field to the create/update organization dialog
• Store the description inside the existing organization metadata JSON, preserving any other metadata keys
• Trim blank descriptions and remove the metadata description key when the field is empty

Validation

• corepack pnpm exec biome check apps/dokploy/server/api/routers/organization.ts apps/dokploy/components/dashboard/organization/handle-organization.tsx
• corepack pnpm --filter dokploy run typecheck

Notes:

• Full recursive corepack pnpm -r run typecheck currently fails on pre-existing unrelated workspace errors in apps/api/apps/schedules under packages/server (module import/implicit any/template processor errors), while the Dokploy app typecheck passes.
• This is a focused slice toward Organisation and Teams Management #1413: editable organization descriptions via existing metadata, without a schema migration.

Related to #1413