Initializes Strava API integration

Sets up the basic structure for integrating with the Strava API.
This includes:
- Adds .devcontainer configuration for consistent development environment.
- Configures eslint and prettier for code quality and formatting.
- Implements secure credential management using Infisical.
- Creates basic Strava client and request classes with authentication handling.
- Sets up basic express routes to return data from the Strava API

This commit lays the foundation for future enhancements such as
fetching and displaying activity data.

.devcontainer/devcontainer.json

@@ -0,0 +1,45 @@
+{
+    "name": "TypeScript Node.js",
+    "dockerFile": "Dockerfile",
+    "context": "..",
+    "remoteUser": "node",
+    "features": {
+        "ghcr.io/devcontainers/features/git:1": {},
+        "ghcr.io/devcontainers/features/github-cli:1": {}
+    },
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "ms-vscode.vscode-typescript-next",
+                "ESLint.eslint",
+                "Prettier.prettier-vscode",
+                "ms-vscode.makefile-tools",
+                "ms-vscode-remote.remote-containers"
+            ],
+            "settings": {
+                "editor.defaultFormatter": "esbenp.prettier-vscode",
+                "editor.formatOnSave": true,
+                "[typescript]": {
+                    "editor.defaultFormatter": "esbenp.prettier-vscode"
+                },
+                "[json]": {
+                    "editor.defaultFormatter": "esbenp.prettier-vscode"
+                },
+                "typescript.tsdk": "node_modules/typescript/lib",
+                "typescript.enablePromptUseWorkspaceTsdk": true,
+                "typescript.format.enable": true
+            }
+        }
+    },
+    "forwardPorts": [
+        3000,
+        5000
+    ],
+    "postCreateCommand": "npm install",
+    "mounts": [
+        "source=${localEnv:HOME}${localEnv:USERPROFILE}/.ssh,target=/home/node/.ssh,type=bind,consistency=cached"
+    ],
+    "remoteEnv": {
+        "NODE_ENV": "development"
+    }
+}