[Botskills][TypeScript] Implement Skill CLI Tool

lib/typescript/botskills/.gitignore

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+lib/**
+bin/**
+typings/**
+export/**

lib/typescript/botskills/README.md

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+# Botskills Command Line tool
+The Botskills tool is a command line tool to manage the skills connected to your assistant solution.
+
+## Prerequisite
+- [Node.js](https://nodejs.org/) version 10.8 or higher
+
+## Installation
+To install using npm
+```bash
+npm install -g botskills
+```
+This will install botskills into your global path.
+To uninstall using npm
+```bash
+npm uninstall -g botskills
+```
+
+## Botskills functionality
+- [Connect](./docs/connect-disconnect.md) a Skill to your assistant
+- [Disconnect](./docs/connect-disconnect.md) a Skill from your assistant
+- [List](./docs/list.md) all Skills connected to your assistant
+
+## Nightly builds
+Nightly builds are based on the latest development code which means they may or may not be stable and probably won't be documented. These builds are better suited for more experienced users and developers although everyone is welcome to give them a shot and provide feedback.
+
+You can get the latest nightly build of Botskills from the [BotBuilder MyGet]() feed. To install the nightly
+```bash
+npm config set registry https://botbuilder.myget.org/F/aitemplates/npm/
+```
+Install using npm
+```bash
+npm install -g botskills
+```
+To reset registry
+```bash
+npm config set registry https://registry.npmjs.org/
+```
+
+## Further Reading
+- [Create and customize Skills for your assistant](https://github.com/Microsoft/AI/blob/master/docs/skills/typescript/create.md).

lib/typescript/botskills/docs/connect-disconnect.md

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+# Connect a Skill to your assistant
+
+To connect a Skill to your assistant:
+
+```bash
+botskills connect [options]
+```
+
+### Options
+
+| Option                        | Description                                                             |
+|-------------------------------|-------------------------------------------------------------------------|
+| -l, --localResource <path>    | Path to local Skill Manifest file                                       |
+| -r, --remoteResource <path>   | URL to remote Skill Manifest                                            |
+| -a, --assistantSkills <path>  | Path to the assistant Skills configuration file                         |
+| --verbose                     | (OPTIONAL) Output detailed information about the processing of the tool |
+| -h, --help                    | Output usage information                                                |
+
+An example on how to use it:
+
+```bash
+botskills connect --skillManifest "./skills/customSkill/customSkillManifest.json" --assistantSkills "./skills.json" --verbose 
+```
+
+> **Note:** The paths to both the Skill Manifest and the assistant Skills configuration file can be relative or absolute paths equally, and should be explicitly a `.json` file.
+
+# Disconnect a Skill from your assistant
+
+To disconnect a Skill from your assistant:
+
+```bash
+botskills disconnect [option]
+```
+
+### Options
+
+| Option                        | Description                                                             |
+|-------------------------------|-------------------------------------------------------------------------|
+| -s, --skillName <path>        | Name of the skill to remove from your assistant (case sensitive)        |
+| -a, --assistantSkills <path>  | Path to the assistant Skills configuration file                         |
+| --verbose                     | (OPTIONAL) Output detailed information about the processing of the tool |
+| -h, --help                    | Output usage information                                                |
+
+An example on how to use it:
+
+```bash
+botskills disconnect --skillName "customSkill" --assistantSkills "./skills.json" --verbose
+```
+
+> **Note:** The path to the assistant Skills configuration file can be relative or absolute path, and should be explicitly a `.json` file.

lib/typescript/botskills/docs/list.md

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+# Listing connected skills
+
+To acces the list of connected skills:
+```bash
+botskills list [options]
+```
+
+### Options
+
+| Option                        | Description                                                             |
+|-------------------------------|-------------------------------------------------------------------------|
+| -a, --assistantSkills <path>  | Path to the assistant Skills configuration file                         |
+| --verbose                     | (OPTIONAL) Output detailed information about the processing of the tool |
+| -h, --help                    | Output usage information                                                |