[Feature] Server pagination implementation (#243)

## Major Changes
- Implement a REST style API app in epapi
- Currently implements a GET method for all entity types in the browse menu (both package level and global)
- Provides paginated results per default with query style filtering for reviewed vs unreviewed.
- Provides new paginated templates with thin wrappers per entity types for easier maintainability
- Implements e2e tests for the API

## Minor changes
- Added more comprehensive gitignore to cover coverage reports and other test/node.js etc. data.
- Add additional CI file for API tests that only gets triggered on API relevant changes.

## ⚠️ Currently only works with session-based authentication. Token based will be added in new PR.

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Co-authored-by: jebus <lorsbach@envipath.com>
Reviewed-on: enviPath/enviPy#243
Co-authored-by: Tobias O <tobias.olenyi@envipath.com>
Co-committed-by: Tobias O <tobias.olenyi@envipath.com>

.gitea/workflows/api-ci.yaml

@@ -0,0 +1,86 @@
+name: API CI
+
+on:
+  pull_request:
+    branches:
+      - develop
+    paths:
+      - 'epapi/**'
+      - 'epdb/models.py'  # API depends on models
+      - 'epdb/logic.py'   # API depends on business logic
+      - 'tests/fixtures/**'  # API tests use fixtures
+  workflow_dispatch:
+
+jobs:
+  api-tests:
+    if: ${{ !contains(gitea.event.pull_request.title, 'WIP') }}
+    runs-on: ubuntu-latest
+
+    services:
+      postgres:
+        image: postgres:16
+        env:
+          POSTGRES_USER: ${{ vars.POSTGRES_USER }}
+          POSTGRES_PASSWORD: ${{ secrets.POSTGRES_PASSWORD }}
+          POSTGRES_DB: ${{ vars.POSTGRES_DB }}
+        ports:
+          - ${{ vars.POSTGRES_PORT}}:5432
+        options: >-
+          --health-cmd="pg_isready -U postgres"
+          --health-interval=10s
+          --health-timeout=5s
+          --health-retries=5
+
+    env:
+      RUNNER_TOOL_CACHE: /toolcache
+      EP_DATA_DIR: /opt/enviPy/
+      ALLOWED_HOSTS: 127.0.0.1,localhost
+      DEBUG: True
+      LOG_LEVEL: INFO
+      MODEL_BUILDING_ENABLED: True
+      APPLICABILITY_DOMAIN_ENABLED: True
+      ENVIFORMER_PRESENT: True
+      ENVIFORMER_DEVICE: cpu
+      FLAG_CELERY_PRESENT: False
+      PLUGINS_ENABLED: True
+      SERVER_URL: http://localhost:8000
+      ADMIN_APPROVAL_REQUIRED: True
+      REGISTRATION_MANDATORY: True
+      LOG_DIR: ''
+      # DB
+      POSTGRES_SERVICE_NAME: postgres
+      POSTGRES_DB: ${{ vars.POSTGRES_DB }}
+      POSTGRES_USER: ${{ vars.POSTGRES_USER }}
+      POSTGRES_PASSWORD: ${{ secrets.POSTGRES_PASSWORD }}
+      POSTGRES_PORT: 5432
+      # SENTRY
+      SENTRY_ENABLED: False
+      # MS ENTRA
+      MS_ENTRA_ENABLED: False
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      # Use shared setup action - skips frontend builds for API-only tests
+      - name: Setup enviPy Environment
+        uses: ./.gitea/actions/setup-envipy
+        with:
+          skip-frontend: 'true'
+          skip-playwright: 'true'
+          ssh-private-key: ${{ secrets.ENVIPY_CI_PRIVATE_KEY }}
+          run-migrations: 'true'
+
+      - name: Run API tests
+        run: |
+          source .venv/bin/activate
+          python manage.py test epapi -v 2
+
+      - name: Test API endpoints availability
+        run: |
+          source .venv/bin/activate
+          python manage.py runserver 0.0.0.0:8000 &
+          SERVER_PID=$!
+          sleep 5
+          curl -f http://localhost:8000/api/v1/docs || echo "API docs not available"
+          kill $SERVER_PID