* refactor use of global Bot
* make the dependency on having an existing running Engine more obvious
* use explicit dependency of engine in RPCServer
* reduce static dependencies in rpcserver
* improve helpers
* revert bad document update, add check for nil error in test
* add basic start stop test
* fix race condition in storage
* skip the test because of race conditions
* fix typo
* add empty line
* Add exchange manager to engine
* Several improvements for engine and friends
1) New file.Exists func
2) gRPC TLS cert expiration date check and regeneration
3) New donation var for use across the codebase
4) Use Go log package until the logger is initialised
* Add cert tests and create dir tree if it doesn't exist for file.Write
* Link up donation address to documentation tool plus minor adjustments
* Fix remaining donation addrs
* Move non-needed reload exchange funcs
* Revert accidental config_example.json changes 🕯️
* Use go logger for logging until the logger has initiliased, otherwise no output will be seen
* Link up portfolio delay val and other fixes
* Run go mod tidy after dependabot PR
* Address nitterinos
