chore: initialize EverOS 1.0.0

md-first memory extraction framework for AI agents.

Markdown is the single source of truth; SQLite holds state and LanceDB
provides the rebuildable vector + BM25 + scalar index. The codebase follows
a single-direction DDD layering (entrypoints -> service -> memory -> infra,
with component / core / config cross-cutting) enforced by import-linter.

Engineering surface:
- Coding conventions in .claude/rules/ (path-scoped) and workflows in
  .claude/skills/ (/commit, /new-branch, /pr).
- GitHub Actions CI runs make lint + test + integration; pre-commit mirrors
  the gates locally (ruff, hygiene hooks, gitlint commit-msg).
- Commit messages follow Conventional Commits, enforced by gitlint.
- make lint also enforces datetime two-zone discipline and OpenAPI drift.

use-cases/claude-code-plugin/plugin.json

@@ -0,0 +1,9 @@
+{
+  "name": "evermem",
+  "version": "0.2.0",
+  "description": "Automatically recalls relevant memories from past sessions and injects them into Claude's context",
+  "author": {
+    "name": "EverMem"
+  },
+  "keywords": ["memory", "context", "recall", "persistence"]
+}