feat(lib): add ContinuousIndexingMath

[PierrickGT]

No description provided.

[github-actions]

Changes to gas cost

Generated at commit: e36313e40ed5736350990cfeeb2835240691eb3e, compared to commit: e809402c4cc21f1fa8291f17ee0aee859f3b0d29

🧾 Summary (20% most significant diffs)

Contract	Method	Avg (+/-)	%
ERC20ExtendedHandler	approve mint	+598 ❌ +3,709 ❌	+1.15% +5.40%

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Full diff report 👇

Contract	Deployment Cost (+/-)	Method	Min (+/-)	%	Avg (+/-)	%	Median (+/-)	%	Max (+/-)	%	# Calls (+/-)
ERC20ExtendedHandler	1,407,347 (0)	approve burn mint transfer transferfrom	32,727 (-204) 43,811 (+216) 666 (0) 790 (0) 921 (0)	-0.62% +0.50% 0.00% 0.00% 0.00%	52,594 (+598) 46,221 (+10) 72,384 (+3,709) 55,296 (+25) 55,768 (+293)	+1.15% +0.02% +5.40% +0.05% +0.53%	52,879 (+24) 46,311 (0) 67,361 (+96) 55,553 (0) 56,034 (0)	+0.05% 0.00% +0.14% 0.00% 0.00%	53,227 (0) 46,510 (-7,107) 101,825 (0) 55,752 (0) 56,245 (0)	0.00% -13.26% 0.00% 0.00% 0.00%	1,248 (-59) 1,234 (0) 1,308 (+55) 1,328 (+15) 1,307 (-11)
ContractHelperHarness	439,021 (0)	getContractFrom	1,938 (0)	0.00%	2,150 (+33)	+1.56%	2,175 (0)	0.00%	2,222 (0)	0.00%	269 (0)
SignatureCheckerHarness	1,018,077 (0)	isValidECDSASignature(address,bytes32,bytes) validateECDSASignature(address,bytes32,bytes) validateECDSASignature(address,bytes32,bytes32,bytes32)	2,271 (0) 2,134 (0) 1,670 (0)	0.00% 0.00% 0.00%	6,109 (-1) 5,972 (-1) 5,530 (-1)	-0.02% -0.02% -0.02%	6,149 (0) 6,012 (0) 5,548 (0)	0.00% 0.00% 0.00%	6,159 (0) 6,022 (0) 5,558 (0)	0.00% 0.00% 0.00%	262 (0) 262 (0) 518 (0)

[github-actions]

LCOV of commit dc05783 during Forge Coverage #104

Summary coverage rate:
  lines......: 89.1% (139 of 156 lines)
  functions..: 84.6% (55 of 65 functions)
  branches...: no data found

Files changed coverage rate:
                                     |Lines       |Functions  |Branches    
  Filename                           |Rate     Num|Rate    Num|Rate     Num
  =========================================================================
  src/libs/ContinuousIndexingMath.sol| 0.0%     15| 0.0%    10|    -      0