add basic readme

Author: DaveeFTW

README.md

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+# VDBTCP - Vita TCP Debugger Companion
+
+This plugin is a companion utility for the vita kernel-side debugger plugin: [kvdb][1]. You cannot use this application without that plugin already installed.
+
+This plugin provides TCP/IP support for debugging applications on the vita. It also provides persistant FTP server and a [vitacompanion][2] compatible API.
+
+If you are looking to debug your own application, you are probably looking to use this plugin.
+
+## Install
+To install copy this plugin to your device, and add it your `config.txt` under the `[main]` category.
+
+## Usage
+This provides three services:
+* GDB stub on port 31337.
+* FTP server on port 1337.
+* vitacompanion service on port 1338.
+
+This plugin can be used to launch an application in debug mode. To do this, you need to issue a `launch` command to the vitacompanion service on port 1338. This command differs from typical vitacompanion and has the following format:
+```
+launch /path/on/vita/to/self
+```
+Once you issue this command the vita will launch it, and the debugger will automatically attach and you can use the GDB protocol on port 31337 to debug it.
+
+## Integrations into IDE
+Coming soon: VSCode example.
+
+tl;dr:
+* Deploy application via FTP.
+* Issue launch command to Vita.
+* Attach to remote GDB process using IDE.
+
+This method should work for most IDEs, but the specific integration will differ for each.
+
+  [1]: https://github.com/DaveeFTW/kvdb
+  [2]: https://github.com/devnoname120/vitacompanion