Billing code search on in-network-rates file.

Steps:

1. Retrieve compressed-datasource file via wget. around 2-5 mins.
2. Expand/uncompressed datasource file via gunzip. around 10-20 mins.
3. Search for billing-code on datasource file via fgrep. around 1 min.

Example Steps.

1. Retrieve compressed-datasource file (3.5 G) via wget.

wget https://mrfmftprod.bcbsnc.com/prod/etl/outbound/in-network-rates/2022-11-15_Preferred-Provider-Network_B00000000001_in-network-rates.json.gz

2. Expand/uncompressed datasource file via gunzip (from 3.5 G to 112 G).

gunzip 2022-11-15_Preferred-Provider-Network_B00000000001_in-network-rates.json.gz

3. Search for billing_code on datasource file via fgrep

I. Usage:

fgrep -l '"billing_code":"YYY"' XXX.json

XXX - json filename
YYY - billing code number

Example:
fgrep -l '"billing_code":"100"' 2023-01-16_State-Health-Plan-Network_BSHP10000001_in-network-rates.json

IF fgrep finds billing-code in file, then it displays file again.
IF fgrep does not find billing-code in file, then it display blank.

Example with time metric command:

```
### Example with fgrep finding a billing code in file, by showing filename again
chriscalip@raptor:~/projects/php/bigquery$ time fgrep -l '"billing_code":"100"' /media/chriscalip/easystore/ths/xmain/2023-01-16_State-Health-Plan-Network_BSHP10000001_in-network-rates.json
/media/chriscalip/easystore/ths/xmain/2023-01-16_State-Health-Plan-Network_BSHP10000001_in-network-rates.json

real    0m41.994s
user    0m7.241s
sys 0m18.599s

### Example with fgrep not finding a billing code in file, shows nothing.
chriscalip@raptor:~/projects/php/bigquery$ time fgrep -l '"billing_code":"FAKE-CODE"' /media/chriscalip/easystore/ths/xmain/2023-01-16_State-Health-Plan-Network_BSHP10000001_in-network-rates.json

real    0m15.648s
user    0m7.598s
sys 0m8.021s

```