halkyon_base: a Serverpod module for sign-in, accounts and instance basics

What every Halkyon server has, taken from Halkyon Learn's: anonymous,
GitHub and email-code sign-in with their endpoints, an account's ways
in and its deletion, the pruning of abandoned anonymous people, of
sign-up attempts and of expired codes, and the instance's basics (the
sign-in ways offered, the source link, the minimum app build, where
people's data and its backups are). Endpoints sit under the nickname
`base`. A host configures it in one place before its pod starts: its
name for the mails, its source link, its minimum build, and hooks that
delete its own data with a person.

The tables keep Learn's names, columns and indexes, so a host moving
onto the module migrates nothing but version rows. Server package under
the SSPL, client under the AGPL, as Learn's are.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

packages/halkyon_base_client/pubspec.yaml

@@ -0,0 +1,16 @@
+name: halkyon_base_client
+description: >-
+  The client side of halkyon_base, generated by Serverpod: what a Halkyon
+  app calls to sign in, to manage its account, and to learn an instance's
+  basics.
+version: 0.1.0
+publish_to: none
+
+environment:
+  sdk: ^3.13.0
+
+resolution: workspace
+
+dependencies:
+  serverpod_auth_idp_client: 4.0.4
+  serverpod_client: 4.0.4