Add noncommercial licensing and Stage 2 snapshot

LICENSE

@@ -0,0 +1,120 @@
+PolyForm Noncommercial License 1.0.0
+
+Official terms: https://polyformproject.org/licenses/noncommercial/1.0.0/
+
+Required Notice: Copyright (c) 2026 jwheo
+
+Acceptance
+
+In order to get any license under these terms, you must agree to them as
+both strict obligations and conditions to all your licenses.
+
+Copyright License
+
+The licensor grants you a copyright license for the software to do
+everything you might do with the software that would otherwise infringe
+the licensor's copyright in it for any permitted purpose. However, you
+may only distribute the software according to Distribution License and
+make changes or new works based on the software according to Changes and
+New Works License.
+
+Distribution License
+
+The licensor grants you an additional copyright license to distribute
+copies of the software. Your license to distribute covers distributing
+the software with changes and new works permitted by Changes and New
+Works License.
+
+Notices
+
+You must ensure that anyone who gets a copy of any part of the software
+from you also gets a copy of these terms or the URL for them above, as
+well as copies of any plain-text lines beginning with "Required Notice:"
+that the licensor provided with the software. For example:
+
+Required Notice: Copyright Yoyodyne, Inc. (http://example.com)
+
+Changes and New Works License
+
+The licensor grants you an additional copyright license to make changes
+and new works based on the software for any permitted purpose.
+
+Patent License
+
+The licensor grants you a patent license for the software that covers
+patent claims the licensor can license, or becomes able to license, that
+you would infringe by using the software.
+
+Noncommercial Purposes
+
+Any noncommercial purpose is a permitted purpose.
+
+Personal Uses
+
+Personal use for research, experiment, and testing for the benefit of
+public knowledge, personal study, private entertainment, hobby projects,
+amateur pursuits, or religious observance, without any anticipated
+commercial application, is use for a permitted purpose.
+
+Noncommercial Organizations
+
+Use by any charitable organization, educational institution, public
+research organization, public safety or health organization,
+environmental protection organization, or government institution is use
+for a permitted purpose regardless of the source of funding or
+obligations resulting from the funding.
+
+Fair Use
+
+You may have "fair use" rights for the software under the law. These
+terms do not limit them.
+
+No Other Rights
+
+These terms do not allow you to sublicense or transfer any of your
+licenses to anyone else, or prevent the licensor from granting licenses
+to anyone else. These terms do not imply any other licenses.
+
+Patent Defense
+
+If you make any written claim that the software infringes or contributes
+to infringement of any patent, your patent license for the software
+granted under these terms ends immediately. If your company makes such a
+claim, your patent license ends immediately for work on behalf of your
+company.
+
+Violations
+
+The first time you are notified in writing that you have violated any of
+these terms, or done anything with the software not covered by your
+licenses, your licenses can nonetheless continue if you come into full
+compliance with these terms, and take practical steps to correct past
+violations, within 32 days of receiving notice. Otherwise, all your
+licenses end immediately.
+
+No Liability
+
+As far as the law allows, the software comes as is, without any warranty
+or condition, and the licensor will not be liable to you for any damages
+arising out of these terms or the use or nature of the software, under
+any kind of legal claim.
+
+Definitions
+
+The licensor is the individual or entity offering these terms, and the
+software is the software the licensor makes available under these terms.
+
+You refers to the individual or entity agreeing to these terms.
+
+Your company is any legal entity, sole proprietorship, or other kind of
+organization that you work for, plus all organizations that have control
+over, are under the control of, or are under common control with that
+organization. Control means ownership of substantially all the assets of
+an entity, or the power to direct its management and policies by vote,
+contract, or otherwise. Control can be direct or indirect.
+
+Your licenses are all the licenses granted to you for the software under
+these terms.
+
+Use means anything you do with the software requiring one of your
+licenses.