[Feature] OpenBB Platform DevContainer (#6426)

* devcontainer and its docs

* typo

* remove file

* remove comments from json

.devcontainer/devcontainer.json

@@ -0,0 +1,13 @@
+{
+    "name": "OpenBB Platform Dev Container",
+    "image": "mcr.microsoft.com/devcontainers/python:1-3.10-bookworm",
+    "postCreateCommand": "python3 -m venv obb && . obb/bin/activate && pip install poetry && python3 openbb_platform/dev_install.py --extras --cli",
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "ms-python.python",
+                "ms-python.vscode-pylance"
+            ]
+        }
+    }
+}