Rename packages from seedu.address to staffconnect

[tsulim]

• Refactor package seedu.address to staffconnect in main
• Refactor package seedu.address to staffconnect in test
• Update remaining files with traces of seedu.address in test
• Update files with traces of the package name seedu.address to staffconnect

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.26%. Comparing base (1c6ff30) to head (742016c).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master      #54   +/-   ##
=========================================
  Coverage     75.26%   75.26%           
  Complexity      419      419           
=========================================
  Files            71       71           
  Lines          1338     1338           
  Branches        126      126           
=========================================
  Hits           1007     1007           
  Misses          301      301           
  Partials         30       30           

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[Pluiexo]

Looks good to me so far! Though I have a point to bring up.

Should the files like AddressBook under model and parser package be renamed as well to better fit the consistency of our product? Would like inputs from others as well to consider if we should make this changes optional if it is too much redundant work

[tsulim]

@Pluiexo Yes, I agree that those should be renamed. However, the title of this pull request is to rename packages name, so those changes will be in a separate pull request made later on.

[Pluiexo]

Alright then!!