T6883 route-map extras support (#402)

• t6883 as_prepend_path fix

• chaneglog

• draft for rm community handling

• rm updates

• unit and integration tests for route maps

• rm unit tests fixed

• 1.4+ rm integration tests draft

• rm set_community parser

• large-community 1.4+

• unit tests fix for rm

• extcommunity config

• pre-commit

• cleanup

• RM bandwidth clauses

• fixing parsers index for 1.3 RM

• updated dic

• fix unit tests

• unit tests for RM

• RM unit tests

• dict literal for reserved keywords in unit tests

• set_src ipv6 replaced unit test

• unit test case for RM call

• RM action type unit tests

• rm match protocol code and unit test

• doc update

• set_table RM

• set_table RM unit test

• unit tests refactor

• copilot recommendations