Refactor README and flake.nix for improved development environment setup; remove embedded Rust tooling references and add Cargo productivity tools

README.md

@@ -15,8 +15,6 @@ direnv allow
 When you enter the devShell (via `direnv allow` or `nix develop`), the following happens automatically:
 
 ✓ **Git Repository**: Initializes `.git` if not present
-✓ **Rust Targets**: Automatically adds common embedded Rust targets (ARM Cortex-M, RISC-V)
-✓ **Cargo Paths**: Sets up `$HOME/.cargo/bin` in PATH for cargo-installed binaries
 ✓ **Welcome Banner**: Displays available tools and quick commands
 
 No manual setup needed! Just start coding.
@@ -24,32 +22,17 @@ No manual setup needed! Just start coding.
 ## Quickstart
 
 ```sh
-nix flake init -t path:../flakes#rust
 nix develop
 cargo build
 ```
 
-## Embedded Rust Support
-
-The devShell automatically installs common embedded Rust targets via `rustup`:
-
-| Target | Platform | Use Case |
-|--------|----------|----------|
-| `thumbv6m-none-eabi` | ARM Cortex-M0/M0+ | RP2040 (Pico) |
-| `thumbv7em-none-eabihf` | ARM Cortex-M4F/M7F | STM32, nRF52840 |
-| `riscv32imc-unknown-none-elf` | RISC-V 32-bit | ESP32-C3 (basic) |
-| `riscv32imac-unknown-none-elf` | RISC-V 32-bit (atomic) | ESP32-C3 (advanced) |
-
-**Note:** ESP32 Xtensa targets require espup or custom toolchains (see [esp-rs](https://github.com/esp-rs)).
-
 ## Flatpak Packaging
 
 This project supports building Flatpak packages for the FeDIY application.
 
 ### Build Flatpak Package
 
-1. Ensure you have `flatpak-builder` installed.
-2. Run:
+1. Run:
 
   ```bash
   make flatpak-build
@@ -80,14 +63,11 @@ flatpak run com.moturpin.fediy
 | **rustfmt** | Rust code formatter |
 | **rust-analyzer** | Language server for IDE integration |
 | **rust-src** | Rust source code (for tools like rust-analyzer) |
-| **probe-rs** | Embedded debugger/flasher for ARM targets |
-| **espflash** | Flashing tool for ESP32 boards |
-| **openocd** | JTAG/SWD debugger for ARM and other targets |
-| **minicom** | Serial terminal for device output |
-| **elf2uf2-rs** | Convert ELF to UF2 format (RP2040) |
-| **picotool** | Pico-specific firmware operations |
-| **avrdude** | AVR microcontroller programmer |
-| **ravedude** | Rapid AVR development utility |
+| **cargo-deny** | Audit dependencies for advisories and license policy |
+| **cargo-edit** | Add/remove/upgrade Cargo dependencies from the CLI |
+| **cargo-watch** | Auto-rebuild on file changes |
+| **flatpak-builder** | Build Flatpak distribution packages |
+| **pre-commit** | Run pre-commit hooks |
 
 ## Testing & Development Features
 
@@ -109,8 +89,11 @@ cargo clippy
 # Format code
 cargo fmt
 
-# Build for embedded target
-cargo build --target thumbv7em-none-eabihf --release
+# Watch and rebuild on changes
+cargo watch -x build
+
+# Build a Flatpak
+make flatpak-build
 ```
 
 ## Project Layout