Support `LIKE`, `REGEXP`, `GLOB` operations on vec0 metadata filtering

[asg017]

TEXT vec0 metadata filters only allow comparisions and EQ/NE constraints. Can we support LIKE, REGEXP, and GLOB?

For like/glob, there are C functions we can call, though unsure how escaping works

• sqlite3_strlike()
• sqlite3_strglob()

For regexp, it depends on what regexp extension is loaded (if any). we could just shell out and call regexp() directly with SQL, but would that be fast?

https://www.sqlite.org/vtab.html#the_xbestindex_method
#define SQLITE_INDEX_CONSTRAINT_LIKE 65 /* 3.10.0 and later */
#define SQLITE_INDEX_CONSTRAINT_GLOB 66 /* 3.10.0 and later */
#define SQLITE_INDEX_CONSTRAINT_REGEXP 67 /* 3.10.0 and later */