Cache RPC list

[rasen68]

Changes

• Implement functions in RpcClient (device/rpc.rs) for storing RPC lists to cache files in OS-appropriate cache directory based on rpc.hash, or reading from cache instead of requesting list from board if a cache exists
• Update tio-tool rpc-list to use cache function
• Update tio-monitor to use cache rpc list to enable tab completion and RPC search
• Process hash broadcasts from board to invalidate stored rpc list in tio-monitor
• Fix bug where session metadata was incorrectly invalidated by Device/DeviceTree

[events555]

Hi, thanks for the changes. I'll merge it to main but will also push a branch with changes (both from a rebasedmeta-fix branch and from cleaning up small things) on top of the PR.

For now I plan on reverting the restructuring the CLI for the shell completion. I got concerned over the way it was organized (particularly from the include!() chain) and will think about what existing CLIs do. Another thing was other programs seem to explicitly handle individual shell environments (zsh, bash, powershell), which these changes didn't.

Some other things to note:

• I changed the SettingsPayload to a typed enum so we don't have to try_into().unwrap() on raw bytes
• I ended up deciding to split the device/rpc.rs into a submodule so it wasn't a giant file
• Renamed RpcDataKind → RpcValueType and RpcMeta → RpcDescriptor
• Made tio-monitor use RpcRegistry (which has a From<&RpcList> for RpcRegistry now) instead of filtering from an RpcList
• Merged the separate cache and RPC worker threads into a single thread with one RpcClient
• Esc no longer quits in tio-health, matching tio-monitor behavior
• Added RpcRegistry::search() to move some of your filtering code from tio-monitor into the library

I fixed, mainly in tio-monitor

• completion search now uses only the method name, so suggestions still show when typing arguments
• entering command mode no longer starts at the oldest history entry

The cache system and TUI completion seems to work well, thanks again for the good work!