feat(movement): add movement state machine with air/ground/wallrun/slide/dash/ground states

- MovementStateMachine: core state machine base
- MovementParams: export-rich tunable resource
- StateGround/StateAir: grounded & aeriel locomotion with coyote, buffered jump, bunny hop
- StateWallRun / StateWallCling: wall-based traversal with wall-jump off
- StateSlide: sprint-parallel slide with friction fallout
- StateDash: burst dash with momentum brake
- PlayerMovementController: entry point wiring to CharacterBody3D
- input_map.cfg: full action map reference file
- characters/player/player_base.tscn: placeholder scene
- movement/tests/test_fsm_runner.gd: 9-state unit test runner

Closes #1

.editorconfig

@@ -1,4 +1,46 @@
 root = true
 
 [*]
+end_of_line = lf
 charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+indent_style = tab
+indent_size = 4
+
+[*.gd]
+indent_style = tab
+indent_size = 4
+max_line_length = 120
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.tscn]
+indent_style = tab
+indent_size = 4
+trim_trailing_whitespace = true
+
+[*.tres]
+indent_style = tab
+indent_size = 4
+trim_trailing_whitespace = true
+
+[*.md]
+indent_style = space
+indent_size = 4
+trim_trailing_whitespace = true
+max_line_length = 120
+insert_final_newline = true
+
+[*.cfg]
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true
+
+[.env*]
+charset = utf-8
+indent_style = unset
+trim_trailing_whitespace = false
+end_of_line = unset
+insert_final_newline = unset
+max_line_length = unset