Added nix flake and shell files for nixos users who want to work on development. You can use flake method => 'nix develop' or non flake method =>`nix-shell'

The shell.nix file is used for both flake and non-flake invocations. The lock file is also set at a version where the project works.
Note the none-flake method will follow the version of the system and isn't guaranteed to work on older installations if they haven't been updated in a while.
Added Documentation for using Nix package manager for development ./Documentation/LinuxDevelopmentSetupUsingNix.md

Signed-off-by: Ayman Jundi <ajundi@gmail.com>

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1749794982,
+        "narHash": "sha256-Kh9K4taXbVuaLC0IL+9HcfvxsSUx8dPB5s5weJcc9pc=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "ee930f9755f58096ac6e8ca94a1887e0534e2d81",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}