New extension: Bitfinex margin funding

extensions/bitfinex/.eslintrc.json

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+{
+  "root": true,
+  "env": {
+    "es2020": true,
+    "node": true
+  },
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint"],
+  "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended", "prettier"]
+}

extensions/bitfinex/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+
+# misc
+.DS_Store

extensions/bitfinex/.prettierrc

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+{
+  "printWidth": 120,
+  "singleQuote": false
+}

extensions/bitfinex/CHANGELOG.md

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+# Bitfinex Changelog
+
+## [Initial Version] - 2022-07-15

extensions/bitfinex/README.md

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+# Bitfinex Extension
+
+## Configuration
+
+1. Go to [Bitfinex API keys](https://setting.bitfinex.com/api#my-keys) and create a new API key with the following permission
+   - **Account History**: `Get historical balances entries and trade information`
+   - **Orders**: `Create and cancel orders`
+   - **Margin Funding** permissions
+   - **Wallets**: `Get wallet balances and addresses`
+2. Open the extension command and paste your API key and secret into the fields.
+3. Choose the currency you want to use.