feat(format): default output to dist/examples house style

Align the formatter defaults and layout with the hand-formatted reference
procedures in dist/examples so a clean `pgtidy fmt` produces the house style.

config.Default():
- align_param_types: false (no type-column alignment in param lists)
- plpgsql_declare_align_type / plpgsql_declare_align_eq: true

Formatter:
- routine header: leading-comma params at column 0, first param at one
  indent, RETURNS/LANGUAGE/volatility/SECURITY each indented one level
- %type / %rowtype printed tight (isPctTypeBoundary)
- DECLARE = / := / DEFAULT column padded only to the widest declaration
  that carries an assignment
- WHERE continuations in body UPDATE/DELETE: AND/OR aligned with WHERE
- EXCEPTION aligned to its enclosing BEGIN; column-0 comment continuations
  kept flush-left

Safety gate:
- SemanticallyEqual tolerates CRLF vs LF inside string literals (normNL);
  the formatter re-emits all layout with st.Newline, so a \r\n inside a
  multi-line string literal is normalisation, not a code change. This was
  why action_init and event_exec_func previously refused to format.

Corpus:
- add the four CRLF reference files as idempotence/safety fixtures
- regenerate test_a and test_mm_proc goldens

FOR...LOOP body indentation keeps the existing +1 convention (LOOP aligned
with FOR); the dist/examples use +2, so loop-body regions differ by
whitespace only.

pkg/format/format_test.go

@@ -23,13 +23,13 @@ func TestFormatHeaderGolden(t *testing.T) {
 
 	want := "--select * from dropall('resolvespec_login');\n" +
 		"CREATE OR REPLACE FUNCTION resolvespec_login(\n" +
-		"   INOUT p_data    jsonb\n" +
-		"  ,OUT p_success boolean\n" +
-		"  ,OUT p_error   text\n" +
+		"  INOUT p_data jsonb\n" +
+		", OUT p_success boolean\n" +
+		", OUT p_error text\n" +
 		")\n" +
-		"LANGUAGE plpgsql\n" +
-		"VOLATILE\n" +
-		"SECURITY DEFINER\n" +
+		"  LANGUAGE plpgsql\n" +
+		"  VOLATILE\n" +
+		"  SECURITY DEFINER\n" +
 		"AS\n" +
 		"$$\nbegin end;\n$$;\n"
 
@@ -130,8 +130,8 @@ func TestFormatIssue1PLpgSQLIndenting(t *testing.T) {
 
 	want := "CREATE FUNCTION f(\n" +
 		")\n" +
-		"RETURNS void\n" +
-		"LANGUAGE plpgsql\n" +
+		"  RETURNS void\n" +
+		"  LANGUAGE plpgsql\n" +
 		"AS\n" +
 		"$$\n" +
 		"DECLARE\n" +
@@ -144,14 +144,14 @@ func TestFormatIssue1PLpgSQLIndenting(t *testing.T) {
 		"    set status = 'done'\n" +
 		"    where\n" +
 		"        u.rid_process = r_lp.rid_process\n" +
-		"      and nv(u.status) <> 'done';\n" +
+		"    and nv(u.status) <> 'done';\n" +
 		"  elsif r_lp.total > 0\n" +
 		"  then\n" +
 		"    update core.process u\n" +
 		"    set status = 'open'\n" +
 		"    where\n" +
 		"        u.rid_process = r_lp.rid_process\n" +
-		"      and nv(u.status) <> 'open';\n" +
+		"    and nv(u.status) <> 'open';\n" +
 		"\n" +
 		"  end if;\n" +
 		"$$;\n"