Rebuilding the species management tool

## Species Management Redesign (Admin Panel)

### Problem

The current species tool has two major limitations:

1. **Centralized control only**
- Only Greenstand Super Admins can create and manage species.

2. **Unscoped dropdown in verification**
- When a user opens the dropdown in the verification tool, **all species** are listed.
- This creates:
- poor UX (long, cluttered list)
- slower verification
- higher risk of incorrect species selection

See related discussion: **#919**

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### Current State

Below is the current species tool. Only Super Admins can add species, and all species appear globally in verification:

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### Proposed Solution

Introduce a **two-layer species management system**:

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### 1. Global Species Pool (Super Admin)

Super Admins manage the master list of species available across the platform.

**Capabilities:**
- Create / edit species
- Maintain canonical dataset (scientific name, common name, etc.)
- Ensure data consistency

**UI concept:**

**Outcome:**
- A clean, controlled **global species pool**

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### 2. Organization-Level Species Selection (Org Admin)

Organization admins can select which species are relevant to their organization.

**Capabilities:**
- View global species list
- Activate/deactivate species for their organization
- Maintain a curated subset

**UI concept:**

**Outcome:**
- Each organization has a **custom species list**

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### 3. Verification Tool Behavior

The species dropdown in the verification tool should:

- Only show **species activated for that organization**
- Not show the full global list
- Optionally support:
- search/autocomplete
- sorting by frequency or recency

**Result:**
- Faster verification workflow
- Reduced cognitive load
- Lower error rate

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### Data Model (High-Level)

Species (global)
Organization
OrganizationSpecies
- org_id
- species_id
- is_active

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### Edge Cases / Considerations

- **Global removal**
- If a species is removed globally, existing references should remain intact (historical data integrity)

- **Deactivation**
- Deactivated species should not appear in verification, but remain in historical records

- **Migration**
- Existing organizations may need:
- default species assignment
- or auto-selection based on historical usage

- **Permissions**
- Super Admin → full control
- Org Admin → selection only

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### Expected Outcome

- Scalable species management across organizations
- Faster and more accurate verification
- Cleaner UI and improved usability
- Better data quality