refactor(protocol): extract two anchor-related functions

[dantaik]

• Refactor the TaikoL1 contract to have two functions for validating anchor transactions. This is not only for better readability, but to make it easier to delete those functions later when anchors can be verified in ZKPs.
• Removed all "@author" from comments
• Fixed a few solint errors
• Renamed enableProofValidation to enableAnchorValidation

[codecov]

Codecov Report

Merging #13199 (fc0a860) into main (16993cd) will increase coverage by 1.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #13199      +/-   ##
==========================================
+ Coverage   60.19%   61.24%   +1.04%     
==========================================
  Files         115      115              
  Lines        3442     3385      -57     
  Branches      466      432      -34     
==========================================
+ Hits         2072     2073       +1     
+ Misses       1283     1225      -58     
  Partials       87       87              

Flag	Coverage Δ		*Carryforward flag
bridge-ui	92.61% <ø> (ø)		Carriedforward from 05a3c86
protocol	52.70% <ø> (+1.58%)	⬆️	Carriedforward from 05a3c86
relayer	65.30% <ø> (+0.15%)	⬆️
ui	100.00% <ø> (ø)		Carriedforward from 05a3c86

*This pull request uses carry forward flags. Click here to find out more.

Impacted Files	Coverage Δ
packages/protocol/contracts/L1/ProofVerifier.sol	0.00% <ø> (ø)
packages/protocol/contracts/L1/TaikoL1.sol	31.48% <ø> (ø)
packages/protocol/contracts/L1/TkoToken.sol	84.21% <ø> (ø)
...ckages/protocol/contracts/L1/libs/LibProposing.sol	6.57% <ø> (ø)
packages/protocol/contracts/L1/libs/LibProving.sol	0.00% <ø> (ø)
packages/protocol/contracts/L1/libs/LibUtils.sol	32.75% <ø> (ø)
...ckages/protocol/contracts/L1/libs/LibVerifying.sol	9.61% <ø> (ø)
packages/protocol/contracts/L2/TaikoL2.sol	53.84% <ø> (ø)
packages/protocol/contracts/bridge/Bridge.sol	41.17% <ø> (ø)
...ackages/protocol/contracts/bridge/BridgedERC20.sol	95.65% <ø> (ø)
... and 44 more

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