feat: go from websocket-server to json rpc websocket/http server

[zeeshanlakhani]

Includes:

• re-purposing of feature flags
  • metrics is always a thing (on)
  • monitoring is the gated feature
  • The websocket-server flag is gone, we only gate push notifications
• JSON-RPC setup and RPC method register
• Prometheus exposition format to JSON parser
• Added todo around split networking config

Features & fixes left to add:

• fix-up example app to use RPC client (in JS/TS)
• jsonschema / OpenRPC doc generation
• (maybe) jsonschema validation
• e2e testing of run workflow
• issue for: allow for prefix matched metrics
• (maybe) (rust)tls connections
• Finish comments

Note: network information events will be in a separate PR by @bgins.

[codecov]

Codecov Report

Merging #405 (7167901) into main (af0964b) will increase coverage by 2.37%.
Report is 1 commits behind head on main.
The diff coverage is 82.30%.

@@            Coverage Diff             @@
##             main     #405      +/-   ##
==========================================
+ Coverage   71.88%   74.26%   +2.37%     
==========================================
  Files          71       73       +2     
  Lines        6972     7669     +697     
==========================================
+ Hits         5012     5695     +683     
- Misses       1960     1974      +14     

Files	Coverage Δ
homestar-core/src/workflow/input/parse.rs	86.36% <ø> (ø)
homestar-core/src/workflow/instruction.rs	64.86% <100.00%> (ø)
homestar-core/src/workflow/instruction_result.rs	90.24% <100.00%> (ø)
homestar-core/src/workflow/task.rs	91.30% <100.00%> (ø)
homestar-runtime/src/logger.rs	92.00% <100.00%> (+0.10%)	⬆️
homestar-runtime/src/metrics.rs	100.00% <100.00%> (ø)
homestar-runtime/src/metrics/exporter.rs	100.00% <100.00%> (ø)
homestar-runtime/src/metrics/node.rs	96.89% <100.00%> (+27.30%)	⬆️
homestar-runtime/src/network/rpc.rs	77.22% <ø> (ø)
homestar-runtime/src/network/swarm.rs	58.62% <100.00%> (ø)
... and 17 more

... and 2 files with indirect coverage changes

[avivash]

@zeeshanlakhani @bgins is this the branch I should use to test the JSON RPC for workflows?

[zeeshanlakhani]

As discussed, @bgins will move around NotifyReceipt to fit within this notification paradigm.