Load platform settings from config

This is useful instead of the commandline parameters
--has-mec --pd-ports --pd-addrs
when SMBIOS doesn't correctly detect the correct platform settings.

- [x] Read from CWD
  - [x] Test on Windows
  - [x] Test on Linux
  - [ ] Test on UEFI
- [x] Read from same folder as binary
  - [x] Test on Windows
  - [x] Test on Linux
  - [ ] Test on UEFI
- [ ] Read from $XDG_CONFIG_HOME on Linux

Sample config for Framework 13 AMD:

```
[platform]
has_mec = false
pd_addrs = [ 0x42, 0x40 ]
pd_ports = [ 1, 2 ]
```

Signed-off-by: Daniel Schaefer <[email protected]>

Author: JohnAZoidberg

.gitignore

@@ -4,3 +4,4 @@ build/
 *.efi
 *.exe
 *.pdb
+framework_tool_config.toml