feat: SPI DMA

Squashed commit of the following:

commit c3e1f696b4fbafb6dd30c6934e4c7c181562e055
Author: kuwoyuki <kuwoyuki@cock.li>
Date:   Sat Oct 12 20:43:12 2024 +0600

    chore: spi dma

commit d1e7df60be3e06ed85ce8639516e299085d3c72b
Author: kuwoyuki <kuwoyuki@cock.li>
Date:   Sat Oct 12 15:14:11 2024 +0600

    static dummies

commit 81682428b471f825e3350e37aa74c373b46d4fef
Author: kuwoyuki <kuwoyuki@cock.li>
Date:   Sat Oct 12 14:45:39 2024 +0600

    dma works?

commit 150c97a4b566712a502d8a2861a2dc0864324d61
Author: kuwoyuki <kuwoyuki@cock.li>
Date:   Sat Oct 12 02:07:39 2024 +0600

    dma?

platformio.ini

@@ -8,9 +8,8 @@
 ; Please visit documentation for the other options and examples
 ; https://docs.platformio.org/page/projectconf.html
 
-[env:genericCH32V203C8T6]
+[env]
 platform = https://git.hye.su/mira/platform-ch32v.git
-
 platform_packages = 
     toolchain-riscv @ https://git.hye.su/mira/toolchain-riscv-linux.git ; gcc 14.2.0
     framework-ch32v003fun @ https://github.com/cnlohr/ch32v003fun.git ; upstream cnlohr repo
@@ -19,7 +18,8 @@ framework = ch32v003fun
 upload_protocol = wlink # isp, minichlink, wch-link, wlink
 build_unflags = -march=rv32imacxw
 build_flags = -march=rv32imac -Wall -Wextra
-; dbg
-; build_type = debug
-; debug_build_unflags = -Og
-; debug_build_flags = -Os -ggdb3 -g3
+
+[env:local]
+platform_packages = 
+    toolchain-riscv @ symlink:///home/mira/src/xpack-riscv-none-elf-gcc-14.2.0-2 ; gcc 14.2.0
+    framework-ch32v003fun @ https://github.com/cnlohr/ch32v003fun.git ; upstream cnlohr repo