feat: initial release of Protocol Droid v0.2.0

A tool for authoring, sharing, and curating social protocols.

Features:
- Protocol library with search, tag filtering, and sort by date/relevance
- Protocol authoring with structured fields (title, description, steps, outcome, practice, source, tags)
- Protocol forking with provenance tracking
- Collection creation with searchable protocol picker and ordering
- User accounts with roles (admin, member, viewer)
- YAML import/export for portability
- Self-hostable on LAMP/Cloudron, works in subdirectories
- Responsive design with hamburger menu on mobile
- About page

Security:
- CSRF protection via Origin/Referer validation
- Session regeneration on login/register
- Secure session cookie params (HttpOnly, SameSite, Secure)
- Visibility enforcement on private/unlisted items
- YAML object injection hardening
- Login rate limiting
- Path traversal protection
- Input validation and length clamping
- Vote value constraining

Stack: PHP 8.x + MySQL/MariaDB, vanilla JS frontend, no external dependencies.

Hippocratic License (HL3-CORE).

LICENSE

@@ -0,0 +1,12 @@
+Hippocratic License (HL3-CORE)
+
+This project is licensed under the Hippocratic License v3.0 (HL3-CORE).
+
+Full text available at: https://firstdonoharm.dev/version/3/0/core.html
+
+Summary: Do no harm. This software may not be used by anyone or any
+organization for any purpose that could cause harm — including but not
+limited to physical harm, violations of human rights, environmental
+damage, or surveillance.
+
+This is not legal advice. See the full license text for the complete terms.