Add project view command

[brodock]

Description
Adds glab project view [repository] [flags] command.

View, will render project name, description and README. Optionally you can pass --web and it will open the project in your default browser instead.

If you don't pass a repository path, it will try to infer based on current git repository. If it finds, it will also use current branch to retrieve the README from, or to open the browser project page within that branch.

It also accepts just a repository name without a namespace, in which it will use your own username as the namespace.

Ex: glab project view glab will open the brodock/glab in my case.

Related Issue
Resolves #777

How Has This Been Tested?

I've only tested this manually. Will work on adding go tests.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation
• Chore (Related to CI or Packaging to platforms)

[codecov]

Codecov Report

Merging #778 (e4cb0f0) into trunk (952d3a2) will decrease coverage by 0.13%.
The diff coverage is 10.00%.

@@            Coverage Diff             @@
##            trunk     #778      +/-   ##
==========================================
- Coverage   58.47%   58.34%   -0.14%     
==========================================
  Files          93       93              
  Lines        6681     6696      +15     
==========================================
  Hits         3907     3907              
- Misses       2395     2409      +14     
- Partials      379      380       +1     

Impacted Files	Coverage Δ
pkg/utils/utils.go	30.23% <0.00%> (-5.39%)	⬇️
internal/glrepo/repo.go	83.49% <33.33%> (-1.80%)	⬇️
commands/project/repo.go	100.00% <100.00%> (ø)

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[profclems]

Thanks a lot @brodock for working on this! This is great!

Just some few stuff to fix up.

[profclems]

All good! Thanks a lot @brodock

[brodock]

I've made it into a draft as I found a few edge cases, I will be looking at it tomorrow.
For example, if I type glab repo view somerepo while outside a repository (like when in the home directory), it fails because of the first call to f.Branch(). So I need to bypass a few things when not in a repository

[brodock]

@profclems this is ready for review again

[profclems]

I have added a few commits to add support for full URLs to allow users specify the repo [git] url as argument.

This will allows users override the repo host and protocol.

Examples:

• glab repo view [email protected]:profclems/glab.git
• glab repo view https://gitlab.company.org/user/repo
• glab repo view https://gitlab.company.org/user/repo.git

[brodock]

@profclems I've tested the last changes, and it seems it added an unexpected behavior: when I type glab repo view gitlab-org/gitlab --web from my current glab branch, it will open gitlab-org/gitlab using that branch instead of using default from API.

I will make a new PR to fix this.