draft an InkHUD variant for Elecrow Thinknode M1 (#6473)

Only an initial guess. No hardware here yet for testing. Button assignments are largely placeholder.

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

variants/ELECROW-ThinkNode-M1/platformio.ini

@@ -10,6 +10,7 @@ build_flags = ${nrf52840_base.build_flags} -Ivariants/ELECROW-ThinkNode-M1
   -DELECROW_ThinkNode_M1
   -DGPS_POWER_TOGGLE
   -L "${platformio.libdeps_dir}/${this.__env__}/bsec2/src/cortex-m4/fpv4-sp-d16-hard"
+  -DUSE_EINK
   -DEINK_DISPLAY_MODEL=GxEPD2_154_D67
   -DEINK_WIDTH=200
   -DEINK_HEIGHT=200
@@ -26,4 +27,23 @@ lib_deps =
   https://github.com/meshtastic/GxEPD2/archive/33db3fa8ee6fc47d160bdb44f8f127c9a9203a10.zip
   lewisxhe/PCF8563_Library@^1.0.1
   khoih-prog/nRF52_PWM@^1.0.1
-;upload_protocol = fs
+;upload_protocol = fs
+
+[env:thinknode_m1-inkhud]
+extends = nrf52840_base, inkhud
+board = ThinkNode-M1
+board_check = true
+debug_tool = jlink
+build_flags = 
+  ${nrf52840_base.build_flags}
+  ${inkhud.build_flags}
+  -I variants/ELECROW-ThinkNode-M1
+  -D ELECROW_ThinkNode_M1
+  -L "${platformio.libdeps_dir}/${this.__env__}/bsec2/src/cortex-m4/fpv4-sp-d16-hard"
+build_src_filter = 
+  ${nrf52_base.build_src_filter} 
+  ${inkhud.build_src_filter}
+lib_deps = 
+  ${inkhud.lib_deps} ; InkHUD libs first, so we get GFXRoot instead of AdafruitGFX
+  ${nrf52840_base.lib_deps}
+  lewisxhe/PCF8563_Library@^1.0.1