Add GitHub Action for testing wolfSSH server with Paramiko SFTP client

[devin-ai-integration]

Add GitHub Action for testing wolfSSH server with Paramiko SFTP client

This PR adds a GitHub Action workflow file that tests the wolfSSH server with Paramiko as an SFTP client. The workflow:

1. Builds wolfSSL with the --enable-all flag
2. Builds wolfSSH with the --enable-all flag
3. Installs Paramiko and other dependencies
4. Creates test directories and a 20MB test file
5. Configures and starts the wolfSSH server
6. Runs a Python script that uses Paramiko to:
   • Upload a 20MB file to the server
   • Download the file from the server
7. Verifies that the uploaded and downloaded files match using cmp
8. Stops the wolfSSH server

The workflow runs on Ubuntu Latest and tests SFTP transfers in both directions with 20MB files.

Link to Devin run: https://app.devin.ai/sessions/1040039816a84b03a614ff93ae722a01
Requested by: [email protected]

[devin-ai-integration]

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[wolfSSL-Bot]

Can one of the admins verify this patch?

[JacobBarthelmeh]

(aside) Ok to test Jenkins