Enforce consistent and correct toml formatting (#2518)

Using taplo, fixes all our broken and inconsistent toml formatting and
adds CI to keep them tidy.

If people want we can customise the format rules as described here
https://taplo.tamasfe.dev/configuration/formatter-options.html

@ggwpez, I suggest zepter is used only for checking features are
propagated, and leave formatting for taplo to avoid duplicate work and
conflicts.

TODO
- [x] Use `exclude = [...]` syntax in taplo file to ignore zombienet
tests instead of deleting the dir

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Bastian Köcher <git@kchr.de>

cumulus/parachains/runtimes/bridge-hubs/bridge-hub-westend/Cargo.toml

@@ -98,7 +98,7 @@ bridge-runtime-common = { path = "../../../../../bridges/bin/runtime-common", fe
 sp-keyring = { path = "../../../../../substrate/primitives/keyring" }
 
 [features]
-default = [ "std" ]
+default = ["std"]
 std = [
 	"bp-asset-hub-westend/std",
 	"bp-bridge-hub-rococo/std",
@@ -233,9 +233,9 @@ try-runtime = [
 	"sp-runtime/try-runtime",
 ]
 
-experimental = [ "pallet-aura/experimental" ]
+experimental = ["pallet-aura/experimental"]
 
 # A feature that should be enabled when the runtime should be built for on-chain
 # deployment. This will disable stuff that shouldn't be part of the on-chain wasm
 # to make it smaller like logging for example.
-on-chain-release-build = [ "sp-api/disable-logging" ]
+on-chain-release-build = ["sp-api/disable-logging"]