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.

.gitlint

@@ -0,0 +1,30 @@
+# gitlint — commit-message format gate (commit-msg pre-commit stage).
+# Enforces Conventional Commits (https://www.conventionalcommits.org):
+#   <type>[(scope)][!]: <description>
+# e.g.  feat: add agentic rerank   |   fix(search): guard empty profile
+# See .claude/skills/commit/SKILL.md for the type list and guidance.
+
+[general]
+# Enable gitlint's built-in Conventional Commits title check.
+contrib=contrib-title-conventional-commits
+
+# Autosquash / generated commits are exempt from the format check.
+ignore-merge-commits=true
+ignore-revert-commits=true
+ignore-fixup-commits=true
+ignore-squash-commits=true
+
+# Allowed Conventional Commit types (extends the spec defaults with the ones
+# this project uses). A commit title's type must be one of these.
+[contrib-title-conventional-commits]
+types=feat,fix,refactor,test,docs,style,perf,chore,build,ci,revert
+
+[title-max-length]
+line-length=72
+
+[body-max-line-length]
+line-length=80
+
+# A single-line commit (no body) is allowed.
+[body-min-length]
+min-length=0