Add initial implementations for various audio processing components

- Created LFO entity for low-frequency oscillation control.
- Added all_pass_filter entity for signal processing.
- Implemented balance_controller for audio balance adjustments.
- Developed debouncer to stabilize input signals.
- Introduced digilent_jstk2 for joystick data handling.
- Added edge_detector_toggle for edge detection functionality.
- Created effect_selector to manage audio effects based on joystick input.
- Implemented jstk_uart_bridge for communication between joystick and UART.
- Developed led_controller for LED management.
- Introduced led_level_controller for controlling multiple LEDs.
- Created moving_average_filter for smoothing input signals.
- Added moving_average_filter_en with enable functionality.
- Implemented mute_controller to handle mute functionality.
- Developed volume_controller for volume adjustments.
- Introduced volume_multiplier for scaling audio signals.
- Created volume_saturator to ensure audio signals stay within bounds.

LAB3/src/led_controller.vhd

@@ -0,0 +1,22 @@
+library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+
+entity led_controller is
+	Generic (
+		LED_WIDTH		: positive := 8
+	);
+	Port (
+		mute_enable		: in std_logic;
+		filter_enable	: in std_logic;
+
+		led_r			: out std_logic_vector(LED_WIDTH-1 downto 0);
+		led_g			: out std_logic_vector(LED_WIDTH-1 downto 0);
+		led_b			: out std_logic_vector(LED_WIDTH-1 downto 0)
+	);
+end led_controller;
+
+architecture Behavioral of led_controller is
+
+begin
+
+end Behavioral;