Initial commit to create @actions/cache package

packages/cache/src/internal/constants.ts

@@ -0,0 +1,14 @@
+export enum CacheFilename {
+  Gzip = 'cache.tgz',
+  Zstd = 'cache.tzst'
+}
+
+export enum CompressionMethod {
+  Gzip = 'gzip',
+  Zstd = 'zstd'
+}
+
+// Socket timeout in milliseconds during download.  If no traffic is received
+// over the socket during this period, the socket is destroyed and the download
+// is aborted.
+export const SocketTimeout = 5000