Add mikrotik_routeros_interface_lte_apn_print_terse

[kwood92]

Adds support for /interface lte print terse

[matt852]

Recommendation: Changes Suggested

Breaking Change: No

Thanks @kwood92 — this is in great shape, and the earlier whitespace/error-rule fixes look good. Two suggestions before merge, both to make the template parse real-world APN tables and not just the builtin default entry:

• FLAGS only matches the default * and is required. As written, a user-added APN (no flag) or a disabled one (X) won't parse. The other mikrotik _terse templates capture flags as a multi-char, optional column — recommend matching that.

  In mikrotik_routeros_interface_lte_apn_print_terse.textfsm, the Value declaration:

  -Value FLAGS (\*)
  +Value FLAGS ([X\*]+)

  And the matching rule in Start, making the flag column optional:

  - ^${INDEX}\s+${FLAGS}\s+name=${NAME}\s+apn=${APN}...
  + ^${INDEX}\s+(${FLAGS}\s+)?name=${NAME}\s+apn=${APN}...

• IP_TYPE can't match ipv4-ipv6. RouterOS supports a dual-stack ip-type=ipv4-ipv6, which the closed (auto|ipv4|ipv6) alternation would fail on. Simplest is to broaden it (the existing ipv4 sample still parses unchanged):

  -Value IP_TYPE (auto|ipv4|ipv6)
  +Value IP_TYPE (\S+)

  (If you'd rather keep the alternation for validation, add ipv4-ipv6 to it and include raw rows that exercise each option.)

Thanks!