Create installation.md

Author: milwad-dev

docs/1.x/installation.md

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+                                                       # Requirements
+***
+- ```PHP >= 8.0```
+- ```Laravel >= 9.0```
+- ```Morilog-Jalali >= 3.x```
+
+
+| GitHub    | L6                 | L7                 | L8                 | L9                 | L10                |
+|-----------|--------------------|--------------------|--------------------|--------------------|--------------------|
+| 1.5       | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: | :x:                |
+| 1.6       | :x:                | :x:                | :x:                | :white_check_mark: | :white_check_mark: |
+| 1.7       | :x:                | :x:                | :x:                | :white_check_mark: | :white_check_mark: |
+
+# Installation
+You can install package with composer.
+
+```bash
+composer require milwad/laravel-validate
+```
+
+# Publish
+If you want to publish lang file for custom validation message you can run this command in terminal:
+
+```shell
+php artisan vendor:publish --tag="validate-lang-{$lang}"
+```
+
+You can replace `$lang` to your lang name, for ex:
+
+```shell
+php artisan vendor:publish --tag="validate-lang-en"
+```
+
+If you don't know about langs name you can go [Support Languages](#support-languages)