[boot] Load programs in boot, not kernel

Remove ELF and initrd loading from the kernel. The bootloader now loads
the initial programs, as it does with the kernel. Other files that were
in the initrd are now on the ESP, and non-program files are just passed
as modules.

modules.yaml

@@ -6,8 +6,6 @@ modules:
         output: jsix.elf
         target: host
         deps:
-            - elf
-            - initrd
             - kutil
         includes:
             - src/kernel
@@ -81,33 +79,13 @@ modules:
     nulldrv:
         kind: exe
         target: user
-        output: nulldrv
+        output: nulldrv.elf
         deps:
           - libc
         source:
             - src/drivers/nulldrv/main.cpp
             - src/drivers/nulldrv/main.s
 
-    elf:
-        kind: lib
-        output: libelf.a
-        deps:
-            - kutil
-        includes:
-            - src/libraries/elf/include
-        source:
-            - src/libraries/elf/elf.cpp
-
-    initrd:
-        kind: lib
-        output: libinitrd.a
-        deps:
-            - kutil
-        includes:
-            - src/libraries/initrd/include
-        source:
-            - src/libraries/initrd/initrd.cpp
-
     kutil:
         kind: lib
         output: libkutil.a
@@ -298,16 +276,6 @@ modules:
             - src/libraries/libc/time/time.c
             - src/libraries/libc/time/timespec_get.c
 
-    makerd:
-        kind: exe
-        target: native
-        output: makerd
-        deps:
-            - initrd
-        source:
-            - src/tools/makerd/entry.cpp
-            - src/tools/makerd/main.cpp
-
     tests:
         kind: exe
         target: native