config-file-input

UGRAMM config file:

Input JSON file support for configuration related parameters. As of now supports Placement pragma.
- Library used: #include “../lib/json.h”
  - https://github.com/nlohmann/json
For placement configuration:
- “skip-placement” : [<-String list of Opcodes or NodeTypes->]; //Both opcode(FADD, FALU) or nodeType(ALU, Memport) are supported.
- Also note that both the keys and values in the JSON file are case-insensitive.

Example1: Skipping placement of constant using the opcode (“const”) as an Input

config.json:
```
{
"skip-placement" : ["const"]
}
```

output:

[2024-09-15 21:41:52.355] [GRAMM] [info] [H] Ignoring placement for application node :: {Const_27|float32=5.00} 
[2024-09-15 21:41:52.355] [GRAMM] [info] [H] Ignoring placement for application node :: {Const_28|float32=13.00} 
[2024-09-15 21:41:52.355] [GRAMM] [info] [H] Ignoring placement for application node :: {Const_29|float32=9.00} 
[2024-09-15 21:41:52.355] [GRAMM] [info] [H] Ignoring placement for application node :: {Const_30|float32=11.00} 
[2024-09-15 21:41:52.355] [GRAMM] [info] [H] Ignoring placement for application node :: {Const_31|float32=3.00} 
[2024-09-15 21:41:52.355] [GRAMM] [info] [H] Ignoring placement for application node :: {Const_32|float32=15.00} 
[2024-09-15 21:41:52.355] [GRAMM] [info] [H] Ignoring placement for application node :: {Const_33|float32=17.00} 
[2024-09-15 21:41:52.355] [GRAMM] [info] [H] Ignoring placement for application node :: {Const_34|float32=7.00} 
[2024-09-15 21:41:52.355] [GRAMM] [info] [H] Ignoring placement for application node :: {Const_35|float32=19.00} 

Fig 1. Mapping output of Example 1 (Constants skipped for placement and route)

Example2: Skipping placement of constant using the nodeType (“constant”) as an Input

config.json:
```
{
"skip-placement" : ["Constant"]
}
```
output:
- Same output as the example 1.

Example3: Skipping placement of constant, memport and FMUL.

config.json:
- Constant & Memport are NodeType (meaning all opcodes under these nodeTypes will be skipped for place and route) and FMUL is a Opcode
```
{
"skip-placement" : ["Constant", "Memport", "FMUL"]
}
```
output:

Fig 2. Skipping of specified nodeType and opcodes in Example 3

Fig 3. Mapping output of Example 3 (Constants, Memport, and FMUL skipped for placement and route)