chore: fix .gitignore to track decompiled .dis/.bin disassemblies

.gitignore used '*' as ignore-all with only extension whitelists, so the 128
handoff/nls_dasm/*.dis + 6 *.bin disassembly outputs (f_563a60, f_56e3e0,
f530850_full, f_52b570, fft, twin, ...) were NOT tracked - data-loss risk.
Now un-ignore handoff/nls_dasm/*.{dis,bin} explicitly. Heavy .bin dumps
(soothe_mem.bin etc.), logs, wav/rpp, dl/lib/bin/ghidra-proj stay ignored.

handoff/nls_dasm/f_5631c0.dis

@@ -0,0 +1,19 @@
+
+soothe_mem.bin:     file format binary
+
+
+Disassembly of section .data:
+
+00000000005631c0 <.data+0x5631c0>:
+  5631c0:	40 53                	rex push %rbx
+  5631c2:	48 83 ec 20          	sub    $0x20,%rsp
+  5631c6:	48 8b d9             	mov    %rcx,%rbx
+  5631c9:	e8 72 02 00 00       	call   0x563440
+  5631ce:	80 bb 91 00 00 00 00 	cmpb   $0x0,0x91(%rbx)
+  5631d5:	75 08                	jne    0x5631df
+  5631d7:	48 8b cb             	mov    %rbx,%rcx
+  5631da:	e8 01 0b 00 00       	call   0x563ce0
+  5631df:	48 8b cb             	mov    %rbx,%rcx
+  5631e2:	48 83 c4 20          	add    $0x20,%rsp
+  5631e6:	5b                   	pop    %rbx
+  5631e7:	e9 b4 0d 00 00       	jmp    0x563fa0