ci: add tests coverage analysis

[YassinEldeeb]

• analyze tests coverage
• compare master with PR and block if percentage is lower
• parse the output and shape it to a readable markdown report
• visualize it
• post on github as a comment

[github-actions]

✅ Benchmark Results

     data_received..................: 63 MB   781 kB/s
     data_sent......................: 99 MB   1.2 MB/s
     http_req_blocked...............: avg=2.15µs  min=701ns    med=1.93µs  max=1.87ms   p(90)=2.19µs  p(95)=2.4µs  
     http_req_connecting............: avg=68ns    min=0s       med=0s      max=786.88µs p(90)=0s      p(95)=0s     
   ✓ http_req_duration..............: avg=27.14ms min=765.5µs  med=26.6ms  max=125.99ms p(90)=43.69ms p(95)=50.07ms
       { expected_response:true }...: avg=27.14ms min=765.5µs  med=26.6ms  max=125.99ms p(90)=43.69ms p(95)=50.07ms
   ✓ http_req_failed................: 0.00%   ✓ 0           ✗ 257099
     http_req_receiving.............: avg=31.88µs min=9.58µs   med=25.31µs max=35.32ms  p(90)=37.62µs p(95)=41.6µs 
     http_req_sending...............: avg=17.43µs min=4.98µs   med=11.05µs max=55.11ms  p(90)=13.44µs p(95)=21.1µs 
     http_req_tls_handshaking.......: avg=0s      min=0s       med=0s      max=0s       p(90)=0s      p(95)=0s     
     http_req_waiting...............: avg=27.09ms min=732.85µs med=26.56ms max=125.95ms p(90)=43.62ms p(95)=49.98ms
     http_reqs......................: 257099  3213.727125/s
     iteration_duration.............: avg=27.23ms min=834.01µs med=26.7ms  max=126.08ms p(90)=43.78ms p(95)=50.17ms
     iterations.....................: 257099  3213.727125/s
   ✓ valid_graphql_response.........: 100.00% ✓ 257099      ✗ 0     
   ✓ valid_http_code................: 100.00% ✓ 257099      ✗ 0     
     vus............................: 1       min=1         max=100 
     vus_max........................: 100     min=100       max=100