Add taxon loader and update simple.html for hierarchy management

- Implemented taxon_loader.py to load taxon hierarchy from hierarchy.json into the database.
- Added functionality to skip loading if taxons already exist.
- Updated simple.html to include a hierarchy browser and styles for better user experience.
- Added modal for adding new species to taxon groups.

Author: AlpoTurunen

.env-example

@@ -1,6 +1,6 @@
 LAJI_API_ACCESS_TOKEN=xxx
 LAJI_API_BASE_URL=https://api.laji.fi/warehouse/private-query/unit/list
-TARGET=KE.1721
+TARGET=KE.1761
 LAJIAUTH_URL=https://fmnh-ws-test-24.it.helsinki.fi/laji-auth/
 SECRET_TIMEOUT_PERIOD=10
 SECRET_KEY=yyy

.gitignore

@@ -1,12 +1,14 @@
 **/venv/**
 **/__pycache__/**
+__pycache__
 .env
+.env-prod
 
-**/results/**
-**/sampledata/**
 
-static/example-data.tsv
-config.py
-.env
+**/secret/**
 
-**/secret/**
+.github/instructions*
+TODO
+UHA_**
+test.csv
+taxon_hierarchy.py