[2.0.0] FS::name() returns the item name as in Arduino SD (#4892)

* FS::name() returns the item name as in Arduino SD

Added method FS::path() that returns the full path

* Adjust examples

libraries/FS/src/vfs_api.h

@@ -66,6 +66,7 @@ public:
     size_t      position() const override;
     size_t      size() const override;
     void        close() override;
+    const char* path() const override;
     const char* name() const override;
     time_t getLastWrite()  override;
     boolean     isDirectory(void) override;