Creating Release Notes for 1.0

[Andriciuc]

Added initial files and modifications to include 1.0 release notes to the TOC and variables. Updates:

• updated the ToC names to make them in line with style guide
• updated variable with new release branch and fixed small release note name

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-17.5.2@f631496). Learn more about missing BASE report.

Additional details and impacted files

@@                Coverage Diff                @@
##             release-17.5.2     #432   +/-   ##
=================================================
  Coverage                  ?   84.67%           
=================================================
  Files                     ?       21           
  Lines                     ?     2590           
  Branches                  ?      401           
=================================================
  Hits                      ?     2193           
  Misses                    ?      316           
  Partials                  ?       81           

Components	Coverage Δ
access	81.11% <0.00%> (?)
catalog	88.22% <0.00%> (?)
common	77.77% <0.00%> (?)
encryption	73.45% <0.00%> (?)
keyring	72.88% <0.00%> (?)
src	91.48% <0.00%> (?)
smgr	94.85% <0.00%> (?)
transam	∅ <0.00%> (?)

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