Merged PR 450: Terminal Service Class

## Summary
This PR is the base implementation of the Terminal Service Class, containing the skeleton structure for #2711.

## Test process
Future me's problem - see #2714

## Checklist
- [X] PR is linked to a **work item**
- [X] **acceptance criteria** of linked ticket are met
- [X] performed **self-review** of the code
- [ ] written **tests** for any new functionality added with this PR
- [] updated the **documentation** if this PR changes or adds functionality
- [ ] written/updated **design docs** if this PR implements new functionality
- [X] updated the **change log**
- [X] ran **pre-commit** checks for code style
- [ ] attended to any **TO-DOs** left in the code

Related work items: #2711

src/primaite/game/game.py

@@ -41,6 +41,7 @@ from primaite.simulator.system.services.ftp.ftp_client import FTPClient
 from primaite.simulator.system.services.ftp.ftp_server import FTPServer
 from primaite.simulator.system.services.ntp.ntp_client import NTPClient
 from primaite.simulator.system.services.ntp.ntp_server import NTPServer
+from primaite.simulator.system.services.terminal.terminal import Terminal
 from primaite.simulator.system.services.web_server.web_server import WebServer
 
 _LOGGER = getLogger(__name__)
@@ -54,6 +55,7 @@ SERVICE_TYPES_MAPPING = {
     "FTPServer": FTPServer,
     "NTPClient": NTPClient,
     "NTPServer": NTPServer,
+    "Terminal": Terminal,
 }
 """List of available services that can be installed on nodes in the PrimAITE Simulation."""