Implement Address.fromString

[darkdrag00nv2]

Closes #2154
Work towards onflow/developer-grants#179

Description

Add Address.fromString method.

---

• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• Code follows the standards mentioned here
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[codecov]

Codecov Report

Merging #2491 (910bdde) into master (68b2291) will increase coverage by 78.35%.
The diff coverage is 90.90%.

@@             Coverage Diff             @@
##           master    #2491       +/-   ##
===========================================
+ Coverage        0   78.35%   +78.35%     
===========================================
  Files           0      327      +327     
  Lines           0    73039    +73039     
===========================================
+ Hits            0    57230    +57230     
- Misses          0    13710    +13710     
- Partials        0     2099     +2099     

Flag	Coverage Δ
unittests	78.35% <90.90%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
runtime/interpreter/interpreter.go	89.87% <ø> (ø)
runtime/interpreter/value.go	69.46% <80.00%> (ø)
runtime/common/address.go	100.00% <100.00%> (ø)
runtime/sema/type.go	89.44% <100.00%> (ø)

... and 323 files with indirect coverage changes

[turbolent]

Nice!