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.

AGENTS.md

@@ -68,6 +68,12 @@ testdata/corpus/   — real-world .pgsql procedures used as the safety/idempoten
    not just a test assertion (`pkg/format/format_test.go`); it is enforced at runtime so a
    formatter bug can never silently drop or alter code.
 
+**Line endings**: the formatter re-emits all layout with `st.Newline` (default `\n`), so a
+CRLF input file is normalised to LF on write. This includes `\r\n` that sits *inside* a
+multi-line string literal — a line-ending change there is layout normalisation, not a change
+of code content, so `SemanticallyEqual` compares string tokens modulo `\r\n` ↔ `\n`
+(`normNL` in `pkg/format/safety.go`). Set `newline: "\r\n"` in `.pgtidy.yaml` to keep CRLF.
+
 ## Commands
 
 ```bash