build: add local just workflow

Add a justfile for the common fcry developer commands. The run recipe is
variadic and uses just positional arguments so program flags are forwarded
through cargo run without needing a second separator.

Keep the default release profile debuggable and checked, then move the
stripped, LTO-enabled artifact settings into the production profile. This
keeps day-to-day release builds easier to inspect while preserving an explicit
production build recipe for optimized distributable binaries.

The clippy recipe uses workspace, all-target, all-feature coverage and denies
warnings so the task runner matches the stricter local verification path.

Test Plan:
- cargo clippy
- cargo clippy --benches
- cargo clippy --tests
- cargo +nightly fmt
- just --fmt --check
- just run --help
- just clippy
- git diff --cached --check

Refs: none

Cargo.toml

@@ -36,8 +36,20 @@ windows-sys = {
 }
 
 [profile.release]
+debug = true
+strip = false
+debug-assertions = true
+overflow-checks = true
+lto = false
+panic = "unwind"
+incremental = true
+
+[profile.production]
+inherits = "release"
 debug = false
 strip = true
+debug-assertions = false
+overflow-checks = false
 lto = true
-panic = "unwind"
+incremental = false
 codegen-units = 1