add session api

[szpnygo]

No description provided.

[codecov]

Codecov Report

Merging #36 (d011142) into main (c0b3342) will decrease coverage by 1.10%.
The diff coverage is 0.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #36      +/-   ##
==========================================
- Coverage   62.38%   61.28%   -1.11%     
==========================================
  Files          66       66              
  Lines        2834     2836       +2     
==========================================
- Hits         1768     1738      -30     
- Misses        927      957      +30     
- Partials      139      141       +2     

Impacted Files	Coverage Δ
session/session.go	73.80% <0.00%> (-3.70%)	⬇️
session/pool.go	70.09% <0.00%> (-15.89%)	⬇️
app.go	74.28% <0.00%> (-10.48%)	⬇️
agent/agent.go	52.30% <0.00%> (-2.31%)	⬇️
acceptor/webrtc_conn.go	40.21% <0.00%> (+1.08%)	⬆️