api: Allow querying the packages endpoint

The ".../packages" endpoints for mirror, local repos and snapshots all
share the same syntax for querying. However the "/api/packages" endpoint
doesn't match this. Adjust that to allow for a bit more consistency and
allow querying the full package database.

The current endpoint functionality "/packages/:name" is kept intact and
can be used the same as now

Signed-off-by: Sjoerd Simons <sjoerd@collabora.com>

api/router.go

@@ -138,6 +138,7 @@ func Router(c *ctx.AptlyContext) http.Handler {
 
 	{
 		root.GET("/packages/:key", apiPackagesShow)
+		root.GET("/packages", apiPackages)
 	}
 
 	{