toml: drop vendored folder

[shipperizer]

Aim of the PR ois to get rid of the hydronica/toml vendoring and patching

resorted to change the config parsing in a quite surgical way but mixed that with the refactoring
happy to pick only the small change needed to drop the Mapping from MetaData

• fix: move all toml parsing into a new internal package, drop the mapp…
• fix: drop vendored toml
• fix: removed config setup from main, reshoring log configuration
• fix: upgrade to use BurntSushi/toml

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[shipperizer]

@Fusion after a bit of poking around it seems to me that the best way to drop the vendored folder is to branch the toml library and make the fix we need and use that in go.mod

not sure if that s the way u wanna go forward

other solution would be to overhaul the toml setup, pick a newer library and see if we can use that off the shelf, probably useful given that the current one hasn't been updated in 2y and the original fork instead is actively maintained

[shipperizer]

right reworked a bit the parsing and i was able to drop the "Mappings" in favour of toml.Primitive and selective decoding

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SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
7 Code Smells

No Coverage information
3.5% Duplication

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