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/LFO.vhd

@@ -0,0 +1,40 @@
+    library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+
+-- Uncomment the following library declaration if using
+-- arithmetic functions with Signed or Unsigned values
+use IEEE.NUMERIC_STD.ALL;
+
+entity LFO is
+    generic(
+        CHANNEL_LENGHT  : integer := 24;
+        JOYSTICK_LENGHT  : integer := 10;
+        CLK_PERIOD_NS   : integer := 10;
+        TRIANGULAR_COUNTER_LENGHT    : integer := 10 -- Triangular wave period length
+    );
+    Port (
+        
+            aclk			: in std_logic;
+            aresetn			: in std_logic;
+            
+            lfo_period      : in std_logic_vector(JOYSTICK_LENGHT-1 downto 0);
+            
+            lfo_enable      : in std_logic;
+    
+            s_axis_tvalid	: in std_logic;
+            s_axis_tdata	: in std_logic_vector(CHANNEL_LENGHT-1 downto 0);
+            s_axis_tlast    : in std_logic;
+            s_axis_tready	: out std_logic;
+    
+            m_axis_tvalid	: out std_logic;
+            m_axis_tdata	: out std_logic_vector(CHANNEL_LENGHT-1 downto 0);
+            m_axis_tlast	: out std_logic;
+            m_axis_tready	: in std_logic
+        );
+end entity LFO;
+
+architecture Behavioral of LFO is
+
+begin  
+
+end architecture;