Cleanup: remove dead files from rapid iteration

- Delete suppress_tests.h (unused, replaced by javelin_overrides/unit_test.h)
- Delete patches/ dir (orphaned, sed/python used instead)
- Delete empty .gitmodules (submodule removed, javelin fetched via west)
- Simplify Kconfig: remove unused flags (HEAP_SIZE, USER_DICT_SIZE,
  ORTHOGRAPHY_CACHE, CONSOLE, TRIGGER — not wired to code yet)
- Add .gitignore for __pycache__

Kconfig

@@ -6,42 +6,4 @@ config ZMK_JAVELIN_STENO
     select CPLUSPLUS
     select LIB_CPLUSPLUS
 
-config ZMK_JAVELIN_STENO_HEAP_SIZE
-    int "Heap size for Javelin engine (bytes)"
-    default 32768
-    depends on ZMK_JAVELIN_STENO
-
-config ZMK_JAVELIN_STENO_USER_DICT
-    bool "Enable user dictionary (writable flash)"
-    default y
-    depends on ZMK_JAVELIN_STENO
-
-config ZMK_JAVELIN_STENO_USER_DICT_SIZE
-    int "User dictionary flash size (bytes)"
-    default 16384
-    depends on ZMK_JAVELIN_STENO_USER_DICT
-
-config ZMK_JAVELIN_STENO_ORTHOGRAPHY_CACHE
-    bool "Enable orthography lookup cache (~32KB RAM)"
-    default n
-    depends on ZMK_JAVELIN_STENO
-
-config ZMK_JAVELIN_STENO_CONSOLE
-    bool "Enable steno console commands via USB"
-    default n
-    depends on ZMK_JAVELIN_STENO
-
-choice ZMK_JAVELIN_STENO_TRIGGER
-    prompt "Stroke trigger mode"
-    default ZMK_JAVELIN_STENO_TRIGGER_ALL_UP
-    depends on ZMK_JAVELIN_STENO
-
-config ZMK_JAVELIN_STENO_TRIGGER_ALL_UP
-    bool "All keys up (standard)"
-
-config ZMK_JAVELIN_STENO_TRIGGER_FIRST_UP
-    bool "First key up (faster, less forgiving)"
-
-endchoice
-
 endmenu