Initial commit: move CLI (milestone 2)

- src/move.ts entry point with CLI parsing, --help, --version
- src/cli.ts: parseCliArgs, printHelp, ParsedCliArgs, CliError, VERSION
- src/config.ts: Config type, DEFAULT_CONFIG, resolveConfig
- src/keeper.ts: synthetic-activity sweep + idle-watch loop
- package.json bin entry + shebang for 'bun link' global install
- install.sh: contributor bootstrap (will be repurposed; see
  DISTRIBUTION-PLAN.md for the end-user installer design)
- DISTRIBUTION-PLAN.md captures the tabled end-user distribution work

package.json

@@ -0,0 +1,23 @@
+{
+  "name": "move",
+  "version": "1.0.0",
+  "private": true,
+  "license": "GPL-3.0-only",
+  "type": "module",
+  "bin": {
+    "move": "./src/move.ts"
+  },
+  "engines": {
+    "bun": ">=1.0.0"
+  },
+  "scripts": {
+    "start": "bun run src/move.ts"
+  },
+  "dependencies": {
+    "@nut-tree-fork/nut-js": "^4.2.2"
+  },
+  "devDependencies": {
+    "@types/bun": "latest",
+    "typescript": "^5"
+  }
+}