Tmtccmd

- Some bugfixes for GUI, improved teardown/close handling

- Add `deprecation` dependency to allow marking functions and classes
as deprecated with a decorator
- Improve test structure
- Improve documentation
- Add decorators `service_provider` and `tmtc_definitions_provider` which
avoids some boilerplate code when registering definition provider or packet creation
handlers

- Overhaul of application architecture
- Significant simplification of various modules to increase testability
- Test coverage increased
- Reduced number of modules significantly by moving code into the repective `__init__` files where
possible
- GUI improved, added separate TM listening button
- Documentation improved
- New logo
- Simplified general package structure, remove `src` folder and have `tmtccmd` package and `tests`
package in repo root
- First CFDP handler components
- Reduce usage of globals. The end goal is to remove them altogether
- Reduce overall number of spawned threads
- Added Sequence Count handling modules

- Improve internal structure of sequential sender receiver object
- Add some PUS11 Telecommand Scheduling helpers
- Bugfixes for new modules and code

- Minor fix for CI/CD

- Improve `lint.py`: Add prefix and print out executed command
- Architectural improvements for the `TmListener` component
- Separate functions to set the internal mode
- Moved mode enum outside of class scope
- Call user send callback for both queue commands and regular telecommands

TmTcHandler

- Added a cached `SequentialCommandSenderReceiver`
- Added `CONTINUOUS` mode which will start the receiver thread in the
`SequentialCommandSenderReceiver` instance and only send one TC

Runner module

- Added argument in `__start_tmtc_commander_cli` to defer sending of command
- Added two functions, `init_and_start_daemons` and `performOperation`, to allow
separate calls to initiate the TmTcHandler and send TCs

SequentialCommandSenderReceiver

- Added `send_queue_tc_and_return` function which does only that (and no TM checking)
- Added possibility to start a thread which checks TM