boot: Add EFISTUB and refactor boot protocols

boot/limine/meson.build

@@ -1 +1,25 @@
-kernel_sources += files('entry.c')
+limine_lds = meson.current_source_dir() / 'loader.ld'
+
+limine_c_args = [loader_c_args, '-fno-pic']
+if target_machine.cpu_family() == 'x86_64'
+    limine_c_args += '-mcmodel=kernel'
+endif
+
+executable(
+    'zinnia-limine',
+    sources: [loader_sources, files('main.c'), loader_kernel],
+    include_directories: [common_includes, loader_includes],
+    c_args: limine_c_args,
+    link_args: [
+        '-nostdlib',
+        '-static',
+        '-Wl,-T,' + limine_lds,
+        '-Wl,-z,noexecstack',
+        '-Wl,-z,max-page-size=0x1000',
+        '-Wl,--build-id=none',
+    ],
+    link_depends: limine_lds,
+    pie: false,
+    install: true,
+    install_dir: zinnia_bootdir,
+)