addr2line command for inverse source mapping

[Dentosal]

This PR adds inverse source code mapping, i.e. addr2line utility.
It improves the source mapping format by adding paths of downloaded dependencies to it.

Usage example:

$ forc build -p example_project/fuel_project/ -o fp.bin -g fp.map.json
...
  Compiled script "Fuel example project".
  Bytecode size is 180 bytes.
$ forc addr2line -s example_project -g fp.map.json -i 6
  --> "example_project/fuel_project/src/main.sw":25:14
   |
23 |
24 | fn main() {
25 |   let a = f0(0);
   |              - note: here
26 | }
   |
$ forc addr2line -s example_project -g fp.map.json -i 28 -c 5
  --> "/home/user/.forc/7786363458449203048/default/FuelLabs-sway-lib-core-87138fb/src/ops.sw":13:27
   |
 8 |     fn add(self, other: Self) -> Self;
 9 | }
10 |
11 | impl Add for u64 {
12 |     fn add(self, other: Self) -> Self {
13 |         asm(r1: self, r2: other, r3) {
   |                           ----- note: here
14 |             add r3 r2 r1;
15 |             r3: u64
16 |         }
17 |     }
18 | }
   |

[adlerjohn]

Exciting stuff!