Create README.md

Author: Lexz-08

README.md

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+# program-inst-manager
+## Description
+add program install info, remove it, or check for it for Windows
+
+## How To Use
+This code is made as an example ***automatically referencing `program-inst-manager.dll`***.<br/>
+```csharp
+// create installation info for example
+var installInfo = new ProgramInstallInfo
+{
+    DisplayIcon = "example.ico",
+    DisplayName = "Example Program",
+    DisplayVersion = "1.3.2.0",
+    InstallLocation = @"C:\Program Files (x86)\Example Program",
+    Publisher = "Example Publisher",
+    SystemComponent = false,
+    UninstallString = @"C:\Program Files(x86)\Example Program\uninstall.exe",
+    URLInfoAbout = "https://example.com",
+    CanModify = true,
+    CanRepair = true,
+    ModifyPath = @"C:\Program Files (x86)\Example Program\modify.exe"
+};
+bool hasInstall = Installation.CheckForInstallInfo(installInfo);
+
+// add install info to Registry if not already added
+if (!hasInstall) InstallationManager.AddInstallInfo(installInfo);
+
+// remove install info from Registry if already added
+if (hasInstall) InstallationManager.RemoveInstallInfo(installInfo);
+```
+
+## Documentation
+  * `ProgramInstallInfo`: Installation info for your program
+  * `InstallationManager`
+    * `CheckForInstallInfo`
+      * Returns `true` or `false` depending on whether or not the specified program installation info was added to the Registry
+    * `AddInstallInfo`
+      * Adds the provided program installation info to the Registry
+    * `RemoveInstallInfo`
+      * Removes the specified program installation info from the Registry
+
+## Download
+[Standalone (x86/x32)](https://github.com/Lexz-08/program-inst-manager/releases/latest/download/program-inst-manager-(x86).dll)<br/>
+[Standalone (x64)](https://github.com/Lexz-08/program-inst-manager/releases/latest/download/program-inst-manager-(x86).dll)