Add justfile because it is nice using just (#1720)

* add justfile because it is nice using just

* tweaks

Author: cspotcode

justfile

@@ -0,0 +1,66 @@
+# I like using `just` instead of `npm run` or `yarn`.
+# If you're like me, this justfile is for you.
+# If you are not, you can safely ignore this file.
+
+set positional-arguments
+export PATH := justfile_directory() + "/node_modules/.bin:" + env_var('PATH')
+
+default: test-local
+
+regenerate:
+  #!/usr/bin/env sh
+  node -e '
+    const fs = require("fs");
+    let acc = fs.readFileSync("justfile", "utf8").replace(/(# CUT\n)[\s\S]+/, "$1\n");
+    for(const [key, value] of Object.entries(require("./package.json").scripts)) {
+      acc += `${key} *ARGS:\n  ${value.replace(/npm run /g, "just ").replace(/ --$/, "")} "$@"\n`;
+    }
+    fs.writeFileSync("justfile", acc);
+  '
+
+install:
+  npm install
+
+# EVERYTHING BELOW THIS LINE IS AUTO-GENERATED FROM PACKAGE.JSON
+# DO NOT MODIFY BY HAND
+
+# CUT
+
+lint *ARGS:
+  prettier --check . "$@"
+lint-fix *ARGS:
+  prettier --write . "$@"
+clean *ARGS:
+  rimraf dist tsconfig.schema.json tsconfig.schemastore-schema.json tsconfig.tsbuildinfo tests/ts-node-packed.tgz "$@"
+rebuild *ARGS:
+  just clean && just build "$@"
+build *ARGS:
+  just build-nopack && just build-pack "$@"
+build-nopack *ARGS:
+  just build-tsc && just build-configSchema "$@"
+build-tsc *ARGS:
+  tsc "$@"
+build-configSchema *ARGS:
+  typescript-json-schema --topRef --refs --validationKeywords allOf --out tsconfig.schema.json tsconfig.build-schema.json TsConfigSchema && node --require ./register ./scripts/create-merged-schema "$@"
+build-pack *ARGS:
+  node ./scripts/build-pack.js "$@"
+test-spec *ARGS:
+  ava "$@"
+test-cov *ARGS:
+  nyc ava "$@"
+test *ARGS:
+  just build && just lint && just test-cov "$@"
+test-local *ARGS:
+  just lint-fix && just build-tsc && just build-pack && just test-spec "$@"
+pre-debug *ARGS:
+  just build-tsc && just build-pack "$@"
+coverage-report *ARGS:
+  nyc report --reporter=lcov "$@"
+prepare *ARGS:
+  just clean && just build-nopack "$@"
+api-extractor *ARGS:
+  api-extractor run --local --verbose "$@"
+esm-usage-example *ARGS:
+  just build-tsc && cd esm-usage-example && node --experimental-specifier-resolution node --loader ../esm.mjs ./index "$@"
+esm-usage-example2 *ARGS:
+  just build-tsc && cd tests && TS_NODE_PROJECT=./module-types/override-to-cjs/tsconfig.json node --loader ../esm.mjs ./module-types/override-to-cjs/test.cjs "$@"