feat: add sources form and table

src/app/sources/index.sql

@@ -0,0 +1,45 @@
+SELECT
+    'dynamic' AS component,
+    sqlpage.read_file_as_text('../shared/shell.json') AS properties;
+
+-- ╭─────────────────────────────────────────────────────────╮
+-- │                          Form                           │
+-- ╰─────────────────────────────────────────────────────────╯
+
+
+SELECT
+    'form' AS component,
+    'create.sql' AS action,
+    'Save' AS validate,
+    'Sources' AS title;
+
+SELECT
+    'name' AS name,
+    'Name' AS label,
+    8 AS width,
+    TRUE AS required;
+
+SELECT
+    'uid' AS name,
+    'Identifier' AS label,
+    4 AS width,
+    5 AS maxlength,
+    1 AS minlength,
+    TRUE AS required;
+
+SELECT
+    'uri' AS name,
+    'URI' AS label;
+
+-- ╭─────────────────────────────────────────────────────────╮
+-- │                       Table list                        │
+-- ╰─────────────────────────────────────────────────────────╯
+SELECT
+    'table' AS component,
+    TRUE    as sort,
+    TRUE    as search;
+
+SELECT
+    *
+FROM
+    public.sources;