feat(parser): implement semicolon-separated statements

Add support for semicolon-terminated statements according to the
updated grammar. This change enables executing multiple SQL statements
in a single input by separating them with semicolons. Key improvements
include:
- Update grammar to require semicolons after statements
- Add Semicolon token to the tokenizer
- Implement error recovery by skipping to next semicolon on parse errors
- Create helper functions for checking semicolons in statement parsers
- Add tests for multiple statements and error conditions

notes.org

@@ -231,14 +231,27 @@ i will use rustyline, since it seems like the most feature-complete
 * TODO .license meta-command
 * TODO .help meta-command
 
-* TODO parse insert statements in the form
+* DONE parse insert statements in the form
 insert <id:int> <username:string> <email:string>
-** TODO Row struct
-** TODO parse row insert
-** TODO separate statements with semicolons
-** TODO in case of parse error, skip until next semicolon to better recover
-** TODO serialize/deserialize row to/from raw bytes
-*** TODO look for best practices for creating binary formats
+** DONE parse row insert
+* DONE separate statements with semicolons
+* TODO this error message could be better
+#+begin example
+Error: unexpected token
+   ╭─[ <stdin>:1:24 ]
+   │
+ 1 │ insert 0 "user" "email"
+   │                        │ 
+   │                        ╰─ found end of file ""
+   │ 
+   │ Note: expected token type to be one of ["semicolon"]
+───╯
+#+end example
+* TODO correct all instances of <unknown> in locations
+* TODO meta-commands must be followed by end-of-file
+* DONE in case of parse error, skip until next semicolon to better recover
+* TODO serialize/deserialize row to/from raw bytes
+** TODO look for best practices for creating binary formats
 
 * WAIT cli tests using insta-cmd
 https://insta.rs/docs/cmd/