Add initial project structure with Docker, CI/CD, and Poetry configuration

.devcontainer/DockerFile

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+FROM python:3.14-slim
+# Instalar git y herramientas básicas
+RUN apt-get update && apt-get install -y git curl && rm -rf /var/lib/apt/lists/*
+# Instalar Poetry
+RUN pip install poetry

.devcontainer/devcontainer.json

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+{
+  "name": "Python Poetry Dev",
+  "build": { "dockerfile": "Dockerfile" },
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "ms-python.python",
+        "charliermarsh.ruff",
+        "tamasfe.even-better-toml"
+      ],
+      "settings": {
+        "python.defaultInterpreterPath": "/usr/local/bin/python",
+        "editor.formatOnSave": true,
+        "[python]": {
+          "editor.defaultFormatter": "charliermarsh.ruff",
+          "editor.codeActionsOnSave": {
+            "source.organizeImports": "explicit"
+          }
+        }
+      }
+    }
+  },
+  "postCreateCommand": "poetry install"
+}