Add TxID calculation & New{Layer}Tx Type
New{Layer}Tx methods that compute the `TxID` & `TxType` values from the
transaction values:
- NewL1Tx
- NewL2Tx
- NewPoolL2Tx
Add TxID Scanner & Valuer for database/sql
HistoryDB & L2DB & API packages tests will need to be addapted to the
TestTransaction generation once is done.
Add linter checks to GHA & Fix code to pass lints.
The linters added are:
- whitespace: Tool for detection of leading and trailing whitespace
- gosec: Inspects source code for security problems
- gci: Gci control golang package import order and make it always deterministic
- misspell: Finds commonly misspelled English words in comments
- gomnd: An analyzer to detect magic numbers
The file utils/utils.go is excluded from the checks of gomnd, as uses magic numbers through the code