feat: Get file ingestion running through http

[gjreda]

fixes #366

This started as getting ingestion running through HTTP, but led to some new APIs so that we can move away from the sidecar CLI.

This PR adds the idea of a project_name to the projects core logic, removes some of the legacy /sidecar APIs and also adds the following:

References

• List references => GET /api/references/{project_id}
• Get a reference => GET /api/references/{project_id}/{reference_id}
• Ingest references => POST /api/references/{project_id}
• Update a reference => PUT /api/references/{project_id}/{reference_id}
• Delete a reference => DELETE /api/references/{project_id}/{reference_id}
• Bulk delete references => POST /api/references/{project_id}/bulk_delete

AI

• Chat => POST /api/ai/{project_id}/chat

[codecov]

Codecov Report

Merging #395 (4c1469f) into main (7e79fa0) will decrease coverage by 0.24%.
The diff coverage is 79.31%.

@@            Coverage Diff             @@
##             main     #395      +/-   ##
==========================================
- Coverage   82.98%   82.75%   -0.24%     
==========================================
  Files         184      184              
  Lines       10787    10840      +53     
  Branches     1144     1144              
==========================================
+ Hits         8952     8971      +19     
- Misses       1820     1854      +34     
  Partials       15       15              

Files Changed	Coverage Δ
python/web.py	0.00% <0.00%> (-90.91%)	⬇️
python/sidecar/chat.py	89.06% <57.14%> (-4.28%)	⬇️
python/sidecar/storage.py	84.26% <77.27%> (-13.30%)	⬇️
python/sidecar/http.py	81.92% <78.78%> (-0.78%)	⬇️
python/sidecar/ingest.py	90.14% <100.00%> (+0.10%)	⬆️
python/sidecar/projects.py	96.66% <100.00%> (+0.05%)	⬆️
python/sidecar/shared.py	93.54% <100.00%> (+0.07%)	⬆️
python/sidecar/typing.py	97.57% <100.00%> (+0.01%)	⬆️
src/api/ingestion.ts	100.00% <100.00%> (ø)

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[gjreda]

@cguedes This gets ingest working, but I'd appreciate your feedback on the other ingest related endpoints -- /ingest, /ingest_status, and /ingest_references. I feel like we should change those endpoints to accept a project_id, but I also don't want to break other desktop-related things for y'all on the client side.