feat: implement player movement controller and state machine with dash, slide, and wall-run mechanics

movement/movement_params.gd

@@ -5,20 +5,24 @@ class_name MovementParams
 @export var walk_speed: float = 7.0
 @export var sprint_speed: float = 11.0
 @export var crouch_speed: float = 4.0
-@export var ground_friction: float = 8.0
-@export var ground_acceleration: float = 30.0
-@export var ground_deceleration: float = 20.0
+@export var ground_friction: float = 10.0
+@export var ground_acceleration: float = 50.0
+@export var ground_deceleration: float = 40.0
 
 # ── Jump / Air ────────────────────────────────────────────────────────────────
 @export var jump_velocity: float = 8.5
 @export var coyote_time: float = 0.15
 @export var jump_buffer: float = 0.12
-@export var air_control: float = 0.3
-@export var air_acceleration: float = 25.0
+@export var air_control: float = 0.35
+@export var air_acceleration: float = 30.0
 @export var max_air_speed: float = 16.0
-@export var gravity: float = 20.0
-@export var fall_multiplier: float = 2.0
-@export var low_jump_multiplier: float = 1.5
+@export var gravity: float = 22.0
+@export var fall_multiplier: float = 2.2
+@export var low_jump_multiplier: float = 1.6
+
+# ── Air Strafe (Quake-style) ──────────────────────────────────────────────────
+@export var air_strafe_accel: float = 80.0
+@export var air_strafe_max_gain: float = 1.0
 
 # ── Bunny Hop ─────────────────────────────────────────────────────────────────
 @export var bunny_hop_impulse: float = 1.15
@@ -27,27 +31,27 @@ class_name MovementParams
 
 # ── Slide ─────────────────────────────────────────────────────────────────────
 @export var slide_speed: float = 14.0
-@export var slide_friction: float = 0.88
-@export var slide_min_speed: float = 12.0
+@export var slide_friction: float = 0.96
+@export var slide_min_speed: float = 5.0
 @export var slide_duration: float = 0.8
-@export var slide_into_sprint_delay: float = 0.15
+@export var slide_cooldown: float = 0.4          # Prevents rapid slide re-entry
+@export var slide_jump_speed_boost: float = 1.5   # Extra m/s added when jumping out of slide
 
 # ── Wall Run ──────────────────────────────────────────────────────────────────
 @export var wall_run_speed: float = 12.0
-@export var wall_run_vertical_speed: float = 8.0
+@export var wall_run_vertical_speed: float = 4.0
 @export var wall_run_duration: float = 1.2
-@export var wall_run_gravity: float = -2.0
-@export var wall_run_auto_jump_speed: float = 15.0
+@export var wall_run_gravity: float = 6.0
+@export var wall_run_auto_jump_speed: float = 10.0
 @export var wall_run_jump_horizontal: float = 14.0
 @export var wall_run_jump_off_normal: float = 9.0
 @export var wall_angle_threshold: float = 70.0
-@export var wall_detect_distance: float = 1.0
-@export var wall_ray_up_height: float = 1.2
-@export var wall_ray_down_height: float = 0.4
+@export var wall_detect_distance: float = 0.7
+@export var wall_ray_up_height: float = 0.6
+@export var wall_ray_down_height: float = -0.3
 
 # ── Wall Cling ────────────────────────────────────────────────────────────────
-@export var wall_cling_horizontal_speed: float = 0.0
-@export var wall_cling_vertical_speed: float = 0.0
+@export var wall_cling_slide_speed: float = -1.5
 @export var wall_cling_stamina_drain: float = 2.0
 @export var wall_cling_max_stamina: float = 2.0
 
@@ -68,9 +72,20 @@ class_name MovementParams
 
 # ── Double Jump ───────────────────────────────────────────────────────────────
 @export var double_jump_velocity: float = 8.0
-@export var double_jump_max_count: int = 1
+@export var double_jump_max_count: int = 2  # 1 base jump + 1 double
 
 # ── Chaining ──────────────────────────────────────────────────────────────────
 @export var chain_bonus_per_success: float = 0.05
 @export var chain_bonus_cap: float = 0.50
-@export var chain_window: float = 0.4
+@export var chain_window: float = 1.5
+
+# ── Camera ────────────────────────────────────────────────────────────────────
+@export var mouse_sensitivity: float = 0.002
+@export var base_fov: float = 90.0
+@export var sprint_fov: float = 100.0
+@export var dash_fov: float = 110.0
+@export var fov_lerp_speed: float = 10.0
+@export var head_bob_frequency: float = 12.0
+@export var head_bob_amplitude: float = 0.04
+@export var wall_run_tilt_angle: float = 12.0
+@export var wall_run_tilt_speed: float = 8.0