Add installer

* start

* Add tests

* Clean up changes

* Update tool-cache we consume

* Use custom 7zr

node_modules/@actions/exit/lib/exit.d.ts

@@ -0,0 +1,29 @@
+/**
+ * The code to exit an action
+ */
+export declare enum ExitCode {
+    /**
+     * A code indicating that the action was successful
+     */
+    Success = 0,
+    /**
+     * A code indicating that the action was a failure
+     */
+    Failure = 1,
+    /**
+     * A code indicating that the action is complete, but neither succeeded nor failed
+     */
+    Neutral = 78
+}
+/**
+ * Exit the action as a success.
+ */
+export declare function success(): void;
+/**
+ * Exit the action as a failure.
+ */
+export declare function failure(): void;
+/**
+ * Exit the action neither a success or a failure
+ */
+export declare function neutral(): void;