[Keyboard] Add SharkPCB rev Alpha support (#7090)

* Add SharkPCB rev Alpha support

* Solve PWM pin assignment 

- Solve PWM pin configuration for the SharkPCB rev.Alpha, which backlight pin is B0

* Update shark.c copyright name

* Update shark.h copyright section

* Apply suggestions from code review

Suggestions from @zvecr and @drashna were accepted and applied for neater code. Also fixed typos and removed unused comments. See [pull request](https://github.com/qmk/qmk_firmware/pull/7090/files#diff-70c0a1f44287ae5810170b4180cdaa5d) for more information.

Co-Authored-By: Joel Challis <git@zvecr.com>
Co-Authored-By: Drashna Jaelre <drashna@live.com>

* Update PRODUCT_ID into config.h

* Update metadata info.json

Fields "keyboard_name", "keyboard_folder", "url", "maintainer" were updated

1 files changed, 51 insertions, 0 deletions

diff --git a/keyboards/acheron/shark/shark.c b/keyboards/acheron/shark/shark.c
new file mode 100644
index 0000000000..b15c8a270e
--- /dev/null
+++ b/keyboards/acheron/shark/shark.c
@@ -0,0 +1,51 @@
+/* Copyright 2019 Álvaro "Gondolindrim" Volpato
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "shark.h"
+
+// Optional override functions below.
+// You can leave any or all of these undefined.
+// These are only required if you want to perform custom actions.
+
+/*
+
+void matrix_init_kb(void) {
+  // put your keyboard start-up code here
+  // runs once when the firmware starts up
+
+  matrix_init_user();
+}
+
+void matrix_scan_kb(void) {
+  // put your looping keyboard code here
+  // runs every cycle (a lot)
+
+  matrix_scan_user();
+}
+
+bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
+  // put your per-action keyboard code here
+  // runs for every action, just before processing by the firmware
+
+  return process_record_user(keycode, record);
+}
+
+void led_set_kb(uint8_t usb_led) {
+  // put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
+
+  led_set_user(usb_led);
+}
+
+*/