docs: add links to mcp-db-server for additional database support in README files

feat: improve start.sh with dynamic download URLs and execution permissions

Add unified cross-platform launcher scripts with auto JRE download and setup

Add project launcher scripts for Windows and Unix with auto JRE download and setup

Add executeSqlOnDefault endpoint to DataSourceController; update MysqlOptionService to return JsonNode for SQL execution results and enhance error handling

Add JdbcExecutor service for executing SQL statements; refactor MysqlOptionService to utilize JdbcExecutor for improved SQL execution handling

Update README files to include JAR build instructions and enhance feature descriptions; clarify environment requirements

Add SQL security control feature to prevent dangerous operations; implement validation in MysqlOptionService and configure keywords in application.yml

Update executeSql and executeSqlOnDefault methods in MysqlOptionService to clarify execution priorities and handling of encrypted data; enhance tool descriptions for better guidance

Add executeSqlOnDefault method to MysqlOptionService for executing SQL on the default datasource; include guidance for handling encrypted and encoded data

Enhance MysqlOptionService documentation to clarify handling of encrypted and encoded data; emphasize the use of data processing extensions

Add SM4Decrypt extension for decryption of Base64 encoded data; enhance logging in GroovyService

Refactor GroovyService to enhance dependency loading and error handling; update README for clarity on startup methods

Remove logging configuration from application.yml

Update application configuration and enhance README with Maven quiet parameter explanation