[build] Add README for windows build env setup playbook

scripts/ansible/windows/README.md

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+## Ansible playbook to setup Dev env for Bitmask VPN development
+
+### Prerequisites
+
+On the target windows host, we need SSH access to be enabled, default shell for SSH should be PowerShell and the user account used for Ansible should be an administrator user.
+
+- To enable OpenSSH on windows follow the [Install OpenSSH for Windows](https://learn.microsoft.com/en-us/windows-server/administration/openssh/openssh_install_firstuse?tabs=powershell#install-openssh-for-windows)guide.
+
+- To set `PowerShell` as the default shell for OpenSSH, follow the [OpenSSH Server Configuration](https://learn.microsoft.com/en-us/windows-server/administration/openssh/openssh_server_configuration) guide.
+
+- Then to enable key based access follow the [OpenSSH Key Management Guide](https://learn.microsoft.com/en-us/windows-server/administration/openssh/openssh_keymanagement)
+
+The playbook has been tested to work with Windows 10.
+
+### Playbook organisation
+
+```
+├── inventory.yaml       # Example inventory file
+├── requirements.yaml    # Collection and roles the playbook uses
+├── site.yaml            # Playbook
+```
+
+It currently installs Chocolatey, Qt and Qt Installer FW on the target host apart from the various development tools installed from Chocolatey
+
+For installing Chocolatey and packages from it we make use of the [`chocolatey.chocolatey.win_chocolatey`](https://docs.ansible.com/ansible/latest/collections/chocolatey/chocolatey/win_chocolatey_module.html) module.
+The included `inventory` file is just an example file for easy testing during development
+
+### How to run the playbook
+
+Install the required collections and modules from ansible-galaxy:
+
+```
+$ ansible-galaxy collection install -r requirements.yaml
+```
+
+Make sure you have a valid inventory file, update the provided `inventory.yaml` file with your VM or remote host's IP address and run:
+
+```
+$ ansible-playbook -i inventory.yaml site.yaml --private-key=<path_to_ssh_key>
+```