add mergetree-settings

Author: Blargian

scripts/settings/mergetree-settings.sql

@@ -0,0 +1,16 @@
+WITH
+    merge_tree_settings AS
+        (
+            SELECT format(
+                           '## {} {} \n{}\nType: \`{}\`\n\nDefault: \`{}\`\n{}',
+                           name,
+                           '{#'||name||'}',
+                           multiIf(tier == 'Experimental', '\n<ExperimentalBadge/>\n', tier == 'Beta', '\n<BetaBadge/>\n', ''),
+                           type,
+                           default,
+                           replaceRegexpAll(description, '(?m)(^[ \t]+|[ \t]+$)', '')
+                   )
+            FROM system.merge_tree_settings ORDER BY name
+        )
+SELECT * FROM merge_tree_settings
+INTO OUTFILE 'generated_merge_tree_settings.md' TRUNCATE FORMAT LineAsString