fix: add cache clearing tools (#3896)

Forgot to add these in #3867

.gitignore

@@ -6,7 +6,6 @@ data/
 *.pydevproject
 .project
 .metadata
-bin/
 tmp/
 *.tmp
 *.bak

bin/cache-clear

@@ -0,0 +1,14 @@
+#!/usr/bin/env php
+<?php
+
+/**
+ * Remove all items from the cache
+ */
+
+require __DIR__ . '/../lib/bootstrap.php';
+
+$rssBridge = new RssBridge();
+
+$cache = RssBridge::getCache();
+
+$cache->clear();

bin/cache-prune

@@ -0,0 +1,14 @@
+#!/usr/bin/env php
+<?php
+
+/**
+ * Remove all expired items from the cache
+ */
+
+require __DIR__ . '/../lib/bootstrap.php';
+
+$rssBridge = new RssBridge();
+
+$cache = RssBridge::getCache();
+
+$cache->prune();