feat: add TiDB parser to monorepo (#32)

This commit adds the TiDB parser from the standalone tidb-parser repository into the unified parser monorepo.

Changes:
- Added TiDB grammar files (TiDBLexer.g4, TiDBParser.g4)
- Added helper file (tidb_base_lexer.go)
- Added predefined.tokens file for lexer
- Added test infrastructure with 2 example SQL files
- Created Makefile for building and testing the parser
- Updated package names from 'parser' to 'tidb'
- Updated import paths to github.com/bytebase/parser/tidb
- Updated CI workflow to include tidb in the test matrix
- Generated parser files using ANTLR 4 with Go target
- All 2 tests passing successfully

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <[email protected]>

Author: h3n4l

.github/workflows/tests.yml

@@ -34,7 +34,7 @@ jobs:
         id: set-matrix
         run: |
           # List of all available parsers
-          ALL_PARSERS="redshift postgresql cql snowflake tsql doris trino plsql googlesql mysql partiql"
+          ALL_PARSERS="redshift postgresql cql snowflake tsql doris trino plsql googlesql mysql partiql tidb"
           # Add more parsers here as they are added to the repository
           # ALL_PARSERS="redshift mysql postgresql"
 

tidb/Makefile

@@ -0,0 +1,7 @@
+all: build test
+
+build:
+	antlr -Dlanguage=Go -package tidb -visitor -o . TiDBLexer.g4 TiDBParser.g4
+
+test:
+	go test -v -run TestTiDBSQLParser