Added typescript solution, part 2

part_2/typescript_solution/.eslintrc

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+{
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "prettier",
+    "prettier/@typescript-eslint"
+  ],
+
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint", "prettier"],
+
+  "rules": {
+    "prettier/prettier": "error"
+  }
+}

part_2/typescript_solution/.gitignore

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+build
+node_modules

part_2/typescript_solution/.prettierrc

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+{
+  "semi": true,
+  "singleQuote": true,
+  "tabWidth": 2,
+  "useTabs": false
+}

part_2/typescript_solution/README.md

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+## TypeScript solution (Part 2)
+
+This solution is functions only, no classes. We depend on two external libs at
+runtime - fp-ts and heap. Our buy/sell queues are thus binary heaps this time, 
+which is vastly more performant that the old array slicing we were doing.
+
+## Build tools
+
+Install NPM and NodeJS v14 or above using [nvm](https://github.com/nvm-sh/nvm#installing-and-updating)
+
+## Building and running the TypeScript solution
+
+```
+% npm install
+% npm run build
+% npm run test
+```