* doc: clarify abigen alias flag usage

update the `abigen --alias` flag help info, give an example to make it more clear

related issue: https://github.com/ethereum/go-ethereum/issues/21846



* Update cmd/abigen/main.go

Co-authored-by: ligi <ligi@ligi.de>

Co-authored-by: Martin Holst Swende <martin@swende.se>
Co-authored-by: ligi <ligi@ligi.de>

* cmd/abigen: Sanitize vyper's combined json names

* Review feedback: handle full paths

* accounts/abi/bind, cmd/abigen: implement alias for abigen

* accounts/abi/bind: minor fixes

* accounts/abi/bind: address comments

* cmd/abigen: address comments

* accounts/abi/bind: print error log when identifier collision

* accounts/abi/bind: address comments

* accounts/abi/bind: address comment

* cmd, common: refactor abigen command line interface

* cmd/abigen: address comment

* accounts, abigen: link dependent libs in deploy

* abigen: add java generation

* bind: Fix unit tests

* abigen: add unit test

* Fix CI

* Post-rebase fixes

* Fix rebase issue

* accounts/abi: Gary's review feedback

* accounts/abi: More Gary feedback

* accounts/abi: minor fixes

* accounts/abi, cmd/abigen: support tuple

accounts/abi/bind, cmd/abigen: add objc back

accounts/abi/bind: use byte[24] as function indicator

accounts/abi/bind: resolve struct slice or array

accounts/abi/bind: remove sort logic

accounts: fix issues in abi

* accounts/abi: address comment

* accounts/abi/bind: Accept function ptr parameter

They are translated as [24]byte

* Add Java template version

* accounts/abi/bind: fix merge issue

* Fix CI

* mobile: fix mobile interface

* mobile, accounts: generate correct java binding

* accounts: fix java type binding

* mobile: support integer slice

* accounts/abi/bind, cmd/abigen: implement java binding tests

Allow the --abi flag to be given - to indicate that it should read the
ABI information from standard input. It expects to read the solc output
with the --combined-json flag providing bin, abi, userdoc, devdoc, and
metadata, and works very similarly to the internal invocation of solc,
except it allows external invocation of solc.

This facilitates integration with more complex solc invocations, such
as invocations that require path remapping or --allow-paths tweaks.

Simple usage example:

    solc --combined-json bin,abi,userdoc,devdoc,metadata *.sol | abigen --abi -

Support for legacy version 0.9.x is gone. The compiler version is no
longer cached. Compilation results (and the version) are read directly
from stdout using the --combined-json flag. As a workaround for
ethereum/solidity#651, source code is written to a temporary file before
compilation.

Integration of solc in package ethapi and cmd/abigen is now much simpler
because the compiler wrapper is no longer passed around as a pointer.

Fixes #2806, accidentally