feat: migrate to embassy-executor 0.10

Bump embassy-executor 0.9 -> 0.10 and embassy-rp 0.9 -> 0.10 from crates.io.
Patch esp-hal, esp-rtos, esp-backtrace, esp-println from esp-rs/esp-hal main
branch (esp-rtos 0.2.0 on crates.io pins embassy-executor ^0.9).

API migrations:
- embassy-executor: arch-cortex-m -> platform-cortex-m feature rename
- embassy-executor: SpawnToken now returned as Result from task functions
- esp-hal main: efuse::Efuse::mac_address() -> efuse::base_mac_address()
- esp-hal main: esp_rtos::start() now requires SoftwareInterrupt<0>
- embassy-rp 0.10: SPI constructor requires DMA interrupt bindings

Also fixes UART display stuck on splash (sent Reset instead of On at boot)
and switches just check to clippy -D warnings.

Cargo.toml

@@ -13,10 +13,8 @@ repository = "https://github.com/swaits/donglora"
 keywords = ["lora", "radio", "embedded", "usb", "firmware"]
 categories = ["embedded", "hardware-support", "no-std"]
 
-# UPGRADE BLOCKED: embassy-executor 0.10 and ucobs 0.3 need Rust >= 1.93
-# stable. The ESP Xtensa toolchain (espup) is a nightly fork that may not
-# support the required language features or pass MSRV gating. Revisit when
-# espup catches up. Check: rustup run esp rustc --version
+# NOTE: esp-rtos patched from GitHub main (see [patch.crates-io] below).
+# Remove patches once esp-rtos publishes with embassy-executor 0.10 support.
 [dependencies]
 cfg-if = "1.0"
 critical-section = "1.2"
@@ -24,7 +22,7 @@ defmt = "1.0"
 embedded-hal = "1.0"
 embedded-hal-async = "1.0"
 embassy-embedded-hal = "0.6"
-embassy-executor = "0.9"
+embassy-executor = "0.10"
 embassy-sync = "0.8"
 embassy-time = "0.5"
 embassy-usb = { version = "0.6", features = ["defmt"] }
@@ -78,7 +76,7 @@ embassy-nrf = { version = "0.10", optional = true, features = [
 panic-probe = { version = "1.0", optional = true, features = ["print-defmt"] }
 
 # RP2040 (Waveshare RP2040-LoRa)
-embassy-rp = { version = "0.9", optional = true, features = [
+embassy-rp = { version = "0.10", optional = true, features = [
   "rp2040",
   "time-driver",
   "defmt",
@@ -114,7 +112,7 @@ rak_wisblock_4631 = [
   "dep:defmt-rtt",
   "dep:embassy-nrf",
   "dep:panic-probe",
-  "embassy-executor/arch-cortex-m",
+  "embassy-executor/platform-cortex-m",
   "embassy-executor/executor-thread",
 ]
 wio_tracker_l1 = [
@@ -124,7 +122,7 @@ wio_tracker_l1 = [
   "dep:defmt-rtt",
   "dep:embassy-nrf",
   "dep:panic-probe",
-  "embassy-executor/arch-cortex-m",
+  "embassy-executor/platform-cortex-m",
   "embassy-executor/executor-thread",
 ]
 waveshare_rp2040_lora = [
@@ -134,10 +132,20 @@ waveshare_rp2040_lora = [
   "dep:embassy-rp",
   "dep:panic-probe",
   "dep:portable-atomic",
-  "embassy-executor/arch-cortex-m",
+  "embassy-executor/platform-cortex-m",
   "embassy-executor/executor-thread",
 ]
 
+# REVISIT: esp-rtos 0.2.0 on crates.io pins embassy-executor ^0.9. The
+# esp-rs/esp-hal main branch already supports 0.10. Remove these patches once
+# esp-rtos publishes a release with embassy-executor 0.10 support. Track:
+#   https://github.com/esp-rs/esp-hal/tree/main/esp-rtos
+[patch.crates-io]
+esp-hal       = { git = "https://github.com/esp-rs/esp-hal.git", branch = "main" }
+esp-rtos      = { git = "https://github.com/esp-rs/esp-hal.git", branch = "main" }
+esp-backtrace = { git = "https://github.com/esp-rs/esp-hal.git", branch = "main" }
+esp-println   = { git = "https://github.com/esp-rs/esp-hal.git", branch = "main" }
+
 [lints.clippy]
 undocumented_unsafe_blocks = "deny"