Remove pre-compiled binaries from git, add to .gitignore

Pre-compiled binaries should not be committed to version control:
- They are platform-specific (Linux x86_64 only)
- They bloat the repository
- They bypass the proper build system
- They can cause version mismatches

The build.rs script properly compiles all FastGA utilities from
source and copies them to OUT_DIR. This is the correct approach.

Binaries removed:
- deps/fastga/ALNtoPAF
- deps/fastga/FAtoGDB
- deps/fastga/FastGA
- deps/fastga/GIXmake
- deps/fastga/GIXrm
- deps/fastga/ONEview
- deps/fastga/PAFtoALN

All of these are now built by build.rs during cargo build.

Author: ekg

.gitignore

@@ -1,6 +1,15 @@
 # Build outputs
 /target
 
+# FastGA compiled binaries (built by build.rs, should not be committed)
+deps/fastga/ALNtoPAF
+deps/fastga/FAtoGDB
+deps/fastga/FastGA
+deps/fastga/GIXmake
+deps/fastga/GIXrm
+deps/fastga/ONEview
+deps/fastga/PAFtoALN
+
 # FastGA intermediate files
 *.gix
 *.gdb