BREAKING: replace custom build scripts with nix

General:
- Switched to yarn to better work with nix-based tooling
- Switched package system to use nix. This stops double dependencies and slow cloud compile times, while providing more compile/runtime support to the Nix project
- Removed container builder in favor of internal container tooling
- Package versions no-longer need to be SemVer compliant
- Removed "piston package spec" files, replaced with nix-flake based runtimes
- Exported nosocket and piston-api as packages within the nix-flake
- Removed repo container
- Switched docker building to nix-based container outputting
- Removed docker compose as this is a single container
- Removed package commands from CLI

Packages:
- Move bash, clojure, cobol, node, python2, python3 to new format
- Remainder of packages still need to be moved

v2 API:
- Removed "version" specifier. To select specific versions, use the v3 api
- Removed "/package" endpoints as this doesn't work with the new nix-based system

v3 API:
- Duplicate of v2 API, except instead of passing in a language name an ID is used intead.

package-lock.json

@@ -1,32 +0,0 @@
-{
-    "name": "piston",
-    "lockfileVersion": 2,
-    "requires": true,
-    "packages": {
-        "": {
-            "devDependencies": {
-                "prettier": "2.4.1"
-            }
-        },
-        "node_modules/prettier": {
-            "version": "2.4.1",
-            "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.4.1.tgz",
-            "integrity": "sha512-9fbDAXSBcc6Bs1mZrDYb3XKzDLm4EXXL9sC1LqKP5rZkT6KRr/rf9amVUcODVXgguK/isJz0d0hP72WeaKWsvA==",
-            "dev": true,
-            "bin": {
-                "prettier": "bin-prettier.js"
-            },
-            "engines": {
-                "node": ">=10.13.0"
-            }
-        }
-    },
-    "dependencies": {
-        "prettier": {
-            "version": "2.4.1",
-            "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.4.1.tgz",
-            "integrity": "sha512-9fbDAXSBcc6Bs1mZrDYb3XKzDLm4EXXL9sC1LqKP5rZkT6KRr/rf9amVUcODVXgguK/isJz0d0hP72WeaKWsvA==",
-            "dev": true
-        }
-    }
-}