feat: switch container user to root and add welcome bootstrap for dev environment

- Change container user from 'ubuntu' to 'root' in Dockerfile and docker-compose config
- Set working directory to /home/retoor/projects/snek and inject SNEK_UID environment variable
- Add root password setup and copy terminal bootstrap files (entry script, .welcome.txt) into container image
- Refactor compose exec/start methods to capture stdout/stderr via pipes and handle empty output gracefully
- Remove strict returncode check in exec method, replacing with debug print for non-zero exits

terminal/entry

@@ -0,0 +1,26 @@
+#!/usr/bin/env python3
+
+import os
+import sys
+import pathlib 
+
+import os
+
+os.chdir("/root")
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
+sys.path.insert(0, "/root/bin")
+sys.path.insert(0, "/root/bin/local/bin")
+
+if not pathlib.Path(".welcome.txt").exists():
+    os.system("python3 -m venv --prompt '' .venv")
+    os.system("cp -r /opt/bootstrap/root/.* /root")
+    os.system("cp /opt/bootstrap/.welcome.txt /root/.welcome.txt")
+    pathlib.Path(".bashrc").write_text(pathlib.Path(".bashrc").read_text() + "\n" + "source .venv/bin/activate")
+os.environ["SNEK"] = "1"
+
+if pathlib.Path(".welcome.txt").exists():
+    with open(".welcome.txt") as f:
+        print(f.read())
+
+os.system("bash")