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.

.pre-commit-config.yaml

@@ -0,0 +1,36 @@
+# Local quality gate, run before each commit. Mirrors the checks CI enforces so
+# failures surface locally first. Install with `make install` (sets up both the
+# pre-commit and commit-msg hook stages).
+#
+# Run manually across the repo:  uv run pre-commit run --all-files
+default_install_hook_types: [pre-commit, commit-msg]
+
+repos:
+  # ruff version is kept in sync with the `ruff` dev dependency in uv.lock.
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.15.12
+    hooks:
+      - id: ruff
+        name: ruff (lint + autofix)
+        args: [--fix]
+      - id: ruff-format
+        name: ruff (format)
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v5.0.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-toml
+      - id: check-added-large-files
+        args: [--maxkb=1024]
+      - id: detect-private-key
+      - id: check-merge-conflict
+
+  - repo: https://github.com/jorisroovers/gitlint
+    rev: v0.19.1
+    hooks:
+      - id: gitlint
+        name: gitlint (commit message format)
+        stages: [commit-msg]