add: README, LICENSE

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Tomachi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -0,0 +1,63 @@
+# CheckRegionIntersects
+
+![Java CI with Maven](https://github.com/jaoafa/MyMaid3/workflows/Java%20CI%20with%20Maven/badge.svg)
+![Support jdk](https://img.shields.io/badge/Support%20jdk-oraclejdk8-red.svg)
+![Author](https://img.shields.io/badge/Author%20MinecraftID-mine__book000-orange.svg)
+[![License](https://img.shields.io/github/license/jaoafa/CheckRegionIntersects)](https://github.com/jaoafa/CheckRegionIntersects/blob/master/LICENSE)
+
+[jao Minecraft Server](https://jaoafa.com)における、自治体申請時に既存自治体と交差していないかを調べるためのJavaアプリケーションです。
+
+## 使い方
+
+1. [Releases](https://github.com/jaoafa/CheckRegionIntersects/releases)から最新の`CheckRegionIntersects.jar`をダウンロード。
+2. 比較する自治体の範囲情報を後述する[#範囲情報JSON構築](#範囲情報JSON構築)を使ってそれぞれ構築。
+3. ダウンロード先フォルダをカレントディレクトリとしてターミナル(`cmd.exe`, `powershell.exe`...)を開き、`java -jar CheckRegionIntersects.jar <比較する範囲情報JSON1> <比較する範囲情報JSON2>`と実行。
+4. 終了ステータスが0なら交差無し、1なら交差あり。
+
+例: `爆新地`と`とまちー市`が交差しているか調べるならば(2020/07/19現在):
+
+```shell
+java -jar CheckRegionIntersects.jar [{"x":-513,"z":-512},{"x":-513,"z":512},{"x":512,"z":512},{"x":512,"z":-512}] [{"x":528,"z":-513},{"x":528,"z":512},{"x":1128,"z":512},{"x":1128,"z":-513}]
+```
+
+※場合によっては各JSONをアポストロフィー(`'`)か何かで囲む必要があるかも。
+
+## 範囲情報JSON構築
+
+爆新地を例とした場合、以下は範囲情報。
+
+```text
+#1 -513 -512
+#2 -513 512
+#3 512 512
+#4 512 -512
+```
+
+これを以下のようなJSONに変換する。
+
+```json
+[
+    {
+        "x": -513,
+        "z": -512
+    },
+    {
+        "x": -513,
+        "z": 512
+    },
+    {
+        "x": 512,
+        "z": 512
+    },
+    {
+        "x": 512,
+        "z": -512
+    }
+]
+```
+
+これを1列のJSONにして引数として使う。
+
+## ライセンス
+
+ライセンスは[MIT License](https://github.com/jaoafa/CheckRegionIntersects/blob/master/LICENSE)を適用します。