feat(rpc): Cookie auth system for the RPC endpoint #1967

Job	Run time
Install zebrad from lockfile without cache on ubuntu-latest	8m 42s
Test stable on ubuntu-latest	24m 30s
Test beta on ubuntu-latest	24m 31s
Test stable on macos-latest	24m 31s
Test stable on windows-latest	24m 17s
Check deny.toml bans	27s
Test beta on windows-latest	24m 16s
Check deny.toml bans --features default-release-binaries	33s
Check Cargo.lock is up to date	1m 35s
Check deny.toml bans --all-features	30s
Check for unused dependencies	56s
Check deny.toml sources	32s
Check deny.toml sources --features default-release-binaries	29s
Check deny.toml sources --all-features	30s
Open or update issues for OS integration failures	1s
	2h 16m 20s

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