* Addresses clippy lints
* checks network magic and returns early from `is_regtest()`
* Moves `subsidy.rs` to `zebra-chain`, refactors funding streams into structs, splits them into pre/post NU6 funding streams, and adds them as a field on `testnet::Parameters`
* Replaces Vec with HashMap, adds `ConfiguredFundingStreams` type and conversion logic with constraints.
Minor refactors
* Empties recipients list
* Adds a comment on num_addresses calculation being invalid for configured Testnets, but that being okay since configured testnet parameters are checked when they're being built
* Documentation fixes, minor cleanup, renames a test, adds TODOs, and fixes test logic
* Removes unnecessary `ParameterSubsidy` impl for &Network, adds docs and TODOs
* Adds a "deferred" FundingStreamReceiver, adds a post-NU6 funding streams, updates the `miner_fees_are_valid()` and `subsidy_is_valid()` functions to check that the deferred pool contribution is valid and that there are no unclaimed block subsidies after NU6 activation, and adds some TODOs
* adds `lockbox_input_value()` fn
* Adds TODOs for linking to relevant ZIPs and updating height ranges
* Adds `nu6_lockbox_funding_stream` acceptance test
* updates funding stream values test to check post-NU6 funding streams too, adds Mainnet/Testnet NU6 activation heights, fixes lints/compilation issue
* Reverts Mainnet/Testnet NU6 activation height definitions, updates `test_funding_stream_values()` to use a configured testnet with the post-NU6 Mainnet funding streams height range
* reverts unnecessary refactor
* appease clippy
* Adds a test for `lockbox_input_value()`
* Applies suggestions from code review
* Fixes potential panic
* Fixes bad merge
* Update zebra-chain/src/parameters/network_upgrade.rs
* Updates acceptance test to check that invalid blocks are rejected
* Checks that the original valid block template at height 2 is accepted as a block submission
* Reverts changes for coinbase should balance exactly ZIP
* updates test name
* Updates deferred pool funding stream name to "Lockbox", moves post-NU6 height ranges to constants, updates TODO
* Updates `get_block_subsidy()` RPC method to exclude lockbox funding stream from `fundingstreams` field
* Adds a TODO for updating `FundingStreamReceiver::name()` method docs
* Updates `FundingStreamRecipient::new()` to accept an iterator of items instead of an option of an iterator, updates a comment quoting the coinbase transaction balance consensus rule to note that the current code is inconsistent with the protocol spec, adds a TODO for updating the quote there once the protocol spec has been updated.
* Uses FPF Testnet address for post-NU6 testnet funding streams
* Updates the NU6 consensus branch id
* checks that coinbase transactions balance exactly
* updates test name
* Add a TODO
* Refactor `miner_fees_are_valid`
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Co-authored-by: Pili Guerra <mpguerra@users.noreply.github.com>
Co-authored-by: Marek <mail@marek.onl>
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