Rename regex_t to parse_tree_t and merge module into parser

lib/regex.h

@@ -1,54 +0,0 @@
-/*
- * Copyright (c) Camden Dixie O'Brien
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-#ifndef REGEX_H
-#define REGEX_H
-
-#include <stdbool.h>
-
-typedef struct {
-	bool negated;
-	int count, capacity;
-	char *contents;
-} class_t;
-
-typedef enum {
-	QUANTIFIER_NONE,
-	QUANTIFIER_ZERO_OR_MORE,
-	QUANTIFIER_ONE_OR_MORE,
-	QUANTIFIER_ZERO_OR_ONE,
-} quantifier_t;
-
-typedef enum {
-	TERM_TYPE_WILDCARD,
-	TERM_TYPE_CLASS,
-	TERM_TYPE_LITERAL,
-	TERM_TYPE_REGEX,
-} term_type_t;
-
-struct _term;
-typedef struct {
-	int len, capacity;
-	struct _term *contents;
-} sequence_t;
-
-typedef struct _regex {
-	sequence_t sequence;
-	struct _regex *alternative;
-} regex_t;
-
-typedef struct _term {
-	quantifier_t quantifier;
-	term_type_t type;
-	union {
-		class_t class;
-		char literal;
-		regex_t regex;
-	};
-} term_t;
-
-void regex_free_children(regex_t *r);
-
-#endif