This was previously mostly working because the allocator itself was
moving forward, but since each radio has its own allocator, aircraft
with different radios would often get overlapping intra-flight
frequencies.
Adds the following:
* AJS37
* AV-8B
* JF-17
This does move the preset channel allocation logic into its own class,
since we need to customize that behavior for the AJS37 since it has a
rather unique preset channel layout (see the comments in
`ViggenRadioChannelAllocator` for details).
Not every aircraft has a pydcs radio index, so we can't use that to
index into a list. Any mission with an A-10C crashes, since it would
try to use `None - 1` to index into the list of radios to find the
intra-flight radio.
Also fix the radio ranges for the newly added radios. The current
implementation can't model gaps, so extending the radio ranges across
those gaps means that we might allocate channels that aren't tunable
by those radios. Additionally, the end frequency is exclusive rather
than inclusive, so fix the ranges to include that last tunable
frequency.
Add central registries for allocating TACAN/radio channels to the
Operation. These ensure that each channel is allocated uniquely, and
removes the caller's need to think about which frequency to use.
The registry allocates frequencies based on the radio it is given,
which ensures that the allocated frequency will be compatible with the
radio that needs it. A mapping from aircraft to the radio used by that
aircraft for intra-flight comms (i.e. the F-16 uses the AN/ARC-222)
exists for creating infra-flight channels appropriate for the
aircraft. Inter-flight channels are allocated by a generic UHF radio.
I've moved the inter-flight radio channels from the VHF to UHF range,
since that's the most easily allocated band, and inter-flight will be
in the highest demand.
Intra-flight radios are now generally not shared. For aircraft where
the radio type is not known we will still fall back to the shared
channel, but that will stop being the case as we gain more data.
Tankers have been moved to the Y TACAN band. Not completely needed,
but seems typical for most missions and deconflicts the tankers from
any unknown airfields (which always use the X band in DCS).
