Standardize workspace: Capitalize Justfile references in scripts and docs

Author: hyperpolymath

CONTRIBUTING.md

@@ -42,7 +42,7 @@ snapcreate/
 ├── README.adoc
 ├── SECURITY.md
 ├── flake.nix            # Nix flake (Perimeter 1)
-└── justfile             # Task runner (Perimeter 1)
+└── Justfile             # Task runner (Perimeter 1)
 ```
 
 ---

README.adoc

@@ -34,7 +34,7 @@ snapcreate/
 │   └── ISSUE_TEMPLATE/
 ├── docs/              # Documentation
 │   └── CITATIONS.adoc
-├── justfile           # Task runner (RSR standard template)
+├── Justfile           # Task runner (RSR standard template)
 ├── LICENSE.txt        # Dual MIT / PMPL-1.0-or-later
 ├── SECURITY.md        # Security policy template
 ├── CONTRIBUTING.md    # Contribution guidelines template

ROADMAP.adoc

@@ -82,7 +82,7 @@ The following require project specification before implementation:
 * [ ] guix.scm or flake.nix
 * [ ] deno.json (if using ReScript/JS)
 * [ ] Cargo.toml (if using Rust)
-* [ ] Custom justfile recipes for the project
+* [ ] Custom Justfile recipes for the project
 
 === Source Code