Kantui refactor

[vasilvas99]

Changes in this pull request

Refactor:

• IO, UI and main thread split in separate modules
• New views added (help and describe)
• Config module expanded to be able to parse complex keyboard mappings

IO

• Logs now use the gRPC call to CM and read the grpc stream, rather than reading files from the filesystem
• Added "get_container_by_id" (container description call) in kanto_api

Config

• Add log_tail_lines to set the number of lines in the logs view to be tail-ed
• The KeyConfig struct now has complex (de)serialization behaviour: instead of simple char-s for key-bindings, Combinations with Ctrl (^) and Alt(@) are now allowed in the format "^" or "@". If no modifier is specified, the first char of the string will be taken as the key monitored for events.
• Some of the keys in the default kantui_conf.toml have been remapped (e.g. quit is now Ctrl+Q)
• Refresh cotainer list refresh FPS now an option and reduced to 15 to save on CPU usage.

UI

• Describe screen added (see screenshot below)
• Help screen added (see screenshot below)
• UI becomes side-to-side scrollable if it can't reasonably be rescaled to fit the sceen.

Other

• Pruned unused default features for dependencies - (debug binary reduced from 150 MB to 90mb, stripped release binary is now 3.9M)
• Fixed dependencies to EXACT semvers to ensure reproducible builds in the future
• Re-generated Cargo.lock to match dependency changes

Not in this PR:

• Log following/watching

[vasilvas99]

[vasilvas99]

Describe screen:

[mikehaller]

Tested on qemuarm64 (leda 0.0.5 in docker) and Raspberry Pi 4 64-Bit (leda 0.0.6) with large display connected via HDMI.
Running this version of kantui on serial console (terminal 1)

Looks good to me.

[mikehaller]

License header must be added

[mikehaller]

Looks good now.