Removed storage stream.

[ymh199478]

Q	A
Branch?	v2.0(master)
Bug fix?	No
New feature?	No
Deprecations?	No
Internal Changed?	Yes
Removed	Yes
Tests pass?	Yes
Doc pr?	No

This submission removes Storage from the core library because it is used too frequently.

[codecov-io]

Codecov Report

Merging #228 into master will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #228      +/-   ##
==========================================
- Coverage   96.04%   96.01%   -0.03%     
==========================================
  Files          33       31       -2     
  Lines        2857     2660     -197     
==========================================
- Hits         2744     2554     -190     
+ Misses        113      106       -7

Impacted Files	Coverage Δ
...c/CatLib.Core/Support/Extension/StreamExtension.cs	89.18% <0%> (-2.71%)	⬇️

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