Rename flutter_orm_m8 and flutter_sqlite_m8_generator to the new naming system

[matei-tm]

Is your feature request related to a problem? Please describe. flutter_orm_m8 and flutter_sqlite_m8_generator were renamed to f_orm_m8 and f_orm_m8_sqlite

Describe the solution you'd like Rename dependencies and variables following the current names:

• [x] flutter_orm_m8 => f_orm_m8
• [x] flutter_sqlite_m8_generator => f_orm_m8_generator
• [x] flutterOrmM8Package => fOrmM8Package
• [x] flutter-orm-m8 => f-orm-m8
• [x] flutter-sqlite-m8-generator => f-orm-m8-sqlite
• [x] vscode-flutter-orm-m8 => vscode-f-orm-m8
• [x] flutterSqliteGenerateFixture => fOrmM8SqliteGenerateFixture
• [x] Flutter-orm-m8 => f-orm-m8