Rename project to FeDIY and update related configurations and documentation

flake.nix

@@ -1,5 +1,5 @@
 {
-  description = "A Nix-flake-based Rust development environment";
+  description = "FeDIY: a federated ActivityPub DIY platform built in Rust";
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
@@ -36,7 +36,7 @@
       templates = {
         default = {
           path = ./.;
-          description = "Rust dev environment using fenix; includes a skeletal Cargo project and packaged helper app";
+          description = "FeDIY Rust development environment and package outputs";
         };
       };
 
@@ -109,7 +109,7 @@
                 rustup target add riscv32imac-unknown-none-elf >/dev/null 2>&1 || true  # ESP32-C3 class
                 echo "Note: ESP32 Xtensa targets require espup/custom toolchains (see esp-rs)."
               fi
-              echo "[rust-template] Welcome to the Rust dev shell!"
+              echo "[FeDIY] Welcome to the Rust dev shell!"
               echo "Tools: cargo, rustc, clippy, rustfmt, rust-analyzer, probe-rs, espflash, openocd, minicom, elf2uf2-rs, picotool, avrdude, ravedude"
               echo "Run 'cargo build' to build, or 'nix run .#dev-helper' for a tool summary."
               echo "See README.md for usage."
@@ -121,9 +121,9 @@
       packages = forEachSupportedSystem (
         { pkgs }:
         {
-          # Build the skeletal Cargo project
+          # Build the FeDIY Cargo project
           default = pkgs.rustPlatform.buildRustPackage {
-            pname = "sample-rust-app";
+            pname = "fediy";
             version = "0.1.0";
             src = ./.;
             cargoLock.lockFile = ./Cargo.lock;