Add to Organisation structure in readme

create a visualisation of organisational structure of this repo similar to the one here

https://github.com/BIRDSOpenSource/BIRDS3-ProceduresAndReports

and add to the Organisation Structure section

my method is a bit long, maybe you can find an alternative

1. install trees in your cli
2. type the following command to print a list of the files in the repo gh api '/repos/BIRDSOpenSource/BIRDS3-COM/git/trees/main?recursive=true' -q '.tree[]|.path'
3. copy list into a blank txt file and save
4. use this python code to display the visualisation of the files

```
import os

# Read paths from a file
with open('b3prpaths.txt', 'r') as f:
paths = [line.strip() for line in f.readlines()]

# Sample list of paths (replace this with the output from your command)
# paths = [
# "src/main/java/com/example/App.java",
# "src/main/resources/config.yml",
# "src/test/java/com/example/AppTest.java",
# "docs/README.md",
# "docs/INSTALL.md"
# ]

def build_tree(paths):
tree = {}
for path in paths:
parts = path.split('/')
current = tree
for part in parts:
if part not in current:
current[part] = {}
current = current[part]
return tree

def print_tree(tree, prefix=''):
keys = sorted(tree.keys())
for index, key in enumerate(keys):
if index == len(keys) - 1:
print(prefix + '└── ' + key)
new_prefix = prefix + ' '
else:
print(prefix + '├── ' + key)
new_prefix = prefix + '│ '
print_tree(tree[key], new_prefix)

# Build the tree from paths
tree = build_tree(paths)

# Print the tree
print_tree(tree)
```

6. copy the results on the CLI and paste in the Organisational structure section (remove specific files, the tree should only show folder levels)