fix: restore elb build — import paths, morphology deps, C master declarations header

- Fix wrong ELP import paths in soul.el, elp-input.el, studio.el
  (../foundation/elp/src → ../foundation/el/elp/src)
- Add missing import "morphology.el" to all 29 language morphology modules
- Recompile all affected dist/*.c with correct cross-module declarations
- Add dist/elp-c-decls.h: C-level master forward declarations for ELP package
  (enables elb --force-include to resolve undeclared cross-module calls)

dist/soul.c

@@ -2,6 +2,12 @@
 #include <stdlib.h>
 #include "el_runtime.h"
 
+el_val_t sem_get(el_val_t json, el_val_t key);
+el_val_t generate_frame(el_val_t frame);
+el_val_t generate_frame_lang(el_val_t frame, el_val_t lang_code);
+el_val_t build_form_from_json(el_val_t semantic_form_json, el_val_t lang_code);
+el_val_t generate(el_val_t semantic_form_json);
+el_val_t generate_lang(el_val_t semantic_form_json, el_val_t lang_code);
 el_val_t tier_working(void);
 el_val_t tier_episodic(void);
 el_val_t tier_canonical(void);