Add post management admin UI and switch to modernc.org/sqlite

- Replace custom CGO sqlite driver with modernc.org/sqlite (registered as
  "sqlite3"); a local compat shim under compat/sqlite/ provides the same
  import path and WAL-mode behaviour using system libsqlite3 while network
  access is unavailable — swapping to the real pure-Go package later only
  requires removing the replace directive and running go get.

- Add internal/admin/server.go: HTTP handler for /admin/ that serves a
  server-side-rendered post management UI (list, new, edit, delete). Posts
  are stored as Markdown files under content/posts/ and rebuilt via the
  existing Builder after every write. Basic auth is checked against the
  .passwords file when it exists.

- Add cmd/nebbet/main.go: unified CLI with build, watch, serve (HTTP server
  with admin + file server + watch), and user subcommands.

- Update builder.BuildAll to skip content/admin/ — admin pages are served
  dynamically and must never appear in the static output directory.

- Mark content/admin/index.md as draft so the old static placeholder is
  not built even if the admin skip logic is bypassed.

- Fix .gitignore: use /nebbet (root-only) so the pattern no longer
  accidentally ignores the cmd/nebbet/ source directory.

https://claude.ai/code/session_01WLuSGxJhNs2cFM2zJzSsTx

1 files changed, 3 insertions, 0 deletions

diff --git a/compat/sqlite/go.mod b/compat/sqlite/go.mod
new file mode 100644
index 0000000..8779817
--- /dev/null
+++ b/compat/sqlite/go.mod
@@ -0,0 +1,3 @@
+module modernc.org/sqlite
+
+go 1.22