PostgreSQL for Bjolang: bjosql over Npgsql, for bjoroutines

Every operation suspends its fiber while it waits for the server, and
the ambient cancellation token cancels the query. A Db is a pool; a
transaction holds one connection and hands its function a Db bound to
it, and a nested one is a savepoint. Each SqlValue is a typed parameter,
and a value is read back by the PostgreSQL type of its column. The
server's errors are DbError with its SQLSTATE, and a lost connection is
DbError 08000.

🤖 Generated with [ECA](https://eca.dev)

Co-Authored-By: eca-agent <git@eca.dev>

manifest.bjodat

@@ -0,0 +1,17 @@
+(package
+  (name (bjopg))
+  (version "0.1.0")
+  (description "PostgreSQL for Bjolang: the bjosql query language over Npgsql, for bjoroutines.")
+  (license "MPL-2.0")
+
+  (depends
+    (package (name (bjosql))
+             (version (version-at-least "0.3.0"))
+             (source (git (url "https://github.com/bjoli/bjosql")))))
+
+  ;; A program using this package declares nothing itself.
+  (packages
+    (nuget (id "Npgsql") (version "10.0.0")))
+
+  ;; A library: there is no src/main.bjo.
+  )