decomp: rewrite 7 dispatch + per-overlay + register wrappers

Shape:
    void f(char *obj) {
        char *p = *(char **)(obj + 4);
        func_ov107_020c9264(*(int *)p, TAG1, TAG2);
        per_overlay_callee(*(int *)p, ARG);
        func_0203c634(obj, *(signed char *)(obj + 0x20),
                       per_overlay_cb);
    }

Batch-15 dispatcher with an extra per-overlay call to a helper that
takes (deref_p, small_const) between the tag update and the
SetIndexedSlot register. Byte-parity verified for ov147_020cdb50.
Modules 269/37 unchanged.

Author: Yokimitsuro

src/overlays/ov147/asm_stubs/calls/func_ov147_020cdb50.c

@@ -0,0 +1,11 @@
+extern void func_ov107_020c9264(int obj, int tag1, int tag_lsb);
+extern void func_ov147_020cc9c0(int obj, int arg);
+extern void func_0203c634(void *obj, int idx, void *value);
+extern void func_ov147_020cdb90(void);
+
+void func_ov147_020cdb50(char *obj) {
+    char *p = *(char **)(obj + 4);
+    func_ov107_020c9264(*(int *)p, 2, 0);
+    func_ov147_020cc9c0(*(int *)p, 0);
+    func_0203c634(obj, *(signed char *)(obj + 0x20), func_ov147_020cdb90);
+}

src/overlays/ov147/calls/func_ov147_020cdb50.c

@@ -0,0 +1,11 @@
+extern void func_ov107_020c9264(int obj, int tag1, int tag_lsb);
+extern void func_ov148_020d0600(int obj, int arg);
+extern void func_0203c634(void *obj, int idx, void *value);
+extern void func_ov148_020d17d0(void);
+
+void func_ov148_020d1790(char *obj) {
+    char *p = *(char **)(obj + 4);
+    func_ov107_020c9264(*(int *)p, 2, 0);
+    func_ov148_020d0600(*(int *)p, 0);
+    func_0203c634(obj, *(signed char *)(obj + 0x20), func_ov148_020d17d0);
+}

src/overlays/ov148/asm_stubs/calls/func_ov148_020d1790.c

@@ -0,0 +1,11 @@
+extern void func_ov107_020c9264(int obj, int tag1, int tag_lsb);
+extern void func_ov197_020cc9b4(int obj, int arg);
+extern void func_0203c634(void *obj, int idx, void *value);
+extern void func_ov197_020cdb84(void);
+
+void func_ov197_020cdb44(char *obj) {
+    char *p = *(char **)(obj + 4);
+    func_ov107_020c9264(*(int *)p, 2, 0);
+    func_ov197_020cc9b4(*(int *)p, 0);
+    func_0203c634(obj, *(signed char *)(obj + 0x20), func_ov197_020cdb84);
+}

src/overlays/ov148/calls/func_ov148_020d1790.c

@@ -0,0 +1,11 @@
+extern void func_ov107_020c9264(int obj, int tag1, int tag_lsb);
+extern void func_ov198_020d05f4(int obj, int arg);
+extern void func_0203c634(void *obj, int idx, void *value);
+extern void func_ov198_020d17c4(void);
+
+void func_ov198_020d1784(char *obj) {
+    char *p = *(char **)(obj + 4);
+    func_ov107_020c9264(*(int *)p, 2, 0);
+    func_ov198_020d05f4(*(int *)p, 0);
+    func_0203c634(obj, *(signed char *)(obj + 0x20), func_ov198_020d17c4);
+}

src/overlays/ov197/asm_stubs/calls/func_ov197_020cdb44.c

@@ -0,0 +1,11 @@
+extern void func_ov107_020c9264(int obj, int tag1, int tag_lsb);
+extern void func_ov220_020d2434(int obj, int arg);
+extern void func_0203c634(void *obj, int idx, void *value);
+extern void func_ov220_020d3224(void);
+
+void func_ov220_020d31e4(char *obj) {
+    char *p = *(char **)(obj + 4);
+    func_ov107_020c9264(*(int *)p, 5, 0);
+    func_ov220_020d2434(*(int *)p, 0);
+    func_0203c634(obj, *(signed char *)(obj + 0x20), func_ov220_020d3224);
+}