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__

include/zmk_javelin_steno/suppress_tests.h

@@ -1,37 +0,0 @@
-// Force-included before all Javelin sources to suppress test compilation.
-// Redefine TEST macros to produce no function body, avoiding compilation
-// of test code that references RUN_TESTS-only APIs.
-
-#ifndef JAVELIN_SUPPRESS_TESTS_H
-#define JAVELIN_SUPPRESS_TESTS_H
-
-// Override the test macros from unit_test.h.
-// Original (without RUN_TESTS):
-//   TEST_BEGIN → namespace UnitTestNNN { static void Test() {
-//   TEST_END   → } }
-//
-// Our override makes Test() an empty function, then opens a dead namespace
-// that swallows the original test body code until TEST_END closes it.
-// The swallowed code goes into a struct with an unused template, so it
-// never gets instantiated or compiled.
-
-#undef TEST_BEGIN__
-#undef TEST_BEGIN_
-#undef TEST_BEGIN
-#undef TEST_END
-
-#define TEST_BEGIN__(text, file, line)                  \
-  namespace UnitTest##line {                            \
-    static inline void Test() {}                        \
-    template<bool=false> struct Unused {                 \
-      static void Swallowed() {
-
-#define TEST_END                                        \
-      }                                                 \
-    };                                                  \
-  }
-
-#define TEST_BEGIN_(desc, file, line) TEST_BEGIN__(desc, file, line)
-#define TEST_BEGIN(desc) TEST_BEGIN_(desc, __FILE__, __LINE__)
-
-#endif