Update realtime compiler open flag to support specifying the page to open

[caendesilva]

Pull Request Description:

This pull request aims to enhance the functionality of the new realtime compiler by introducing a --open flag. With this addition, users will have the ability to specify the page to open upon server startup. The default page will remain as 'index', ensuring backward compatibility, while the --open flag offers users the flexibility to easily navigate to a different page.

Example Usage:

php hyde serve --open=dashboard

Executing the command above will result in the server opening localhost:8080/dashboard instead of the default localhost:8080. This feature enhancement aims to streamline user experience by providing a convenient method to set the initial page when launching the server.

It fixes #1504

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.97%. Comparing base (39fe441) to head (bcfd573).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #1694   +/-   ##
=========================================
  Coverage     99.97%   99.97%           
  Complexity     1744     1744           
=========================================
  Files           181      181           
  Lines          4661     4663    +2     
=========================================
+ Hits           4660     4662    +2     
  Misses            1        1           

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