feat: add installation script

[Chaitanyabsprip]

Purpose

There should be an easy way to automate installation of gitmux.
#104

Approach

Currently I've in-lined all dependencies from my scripts and found an alternative method of extracting latest version from Github api instead of using jq.

[Chaitanyabsprip]

I'm not sure how the version argument can be respected when downloading from a package manager. I haven't added choice of version if the package is being installed from a package manager. I would suggest dropping that part of the script and relying only on curl and github api.

[Chaitanyabsprip]

There needs to be a discussion about what the default installation directory will be. Currently I've kept it as $HOME/.local/bin

[arl]

I'm not sure how the version argument can be respected when downloading from a package manager. I haven't added choice of version if the package is being installed from a package manager. I would suggest dropping that part of the script and relying only on curl and github api.

I think we should refine and limit the scope of the script. I expect the script to be used by people that wants to automate installation for their dot files, not to install gitmux for any package manager/distro out there.

In that case, the user already knows the os and architecture they need, these should be passed as arguments to the script.

As for the version number, for a first version of the script I'd say we can also pass it as parameter, and refine later.

There needs to be a discussion about what the default installation directory will be. Currently I've kept it as $HOME/.local/bin

I think this should also be passed as parameter to the script.

To sum it up: we should keep it very simple:

• check that all parameters are passed
• check that dependency exist (curl or wget, jq)

This should be already helpful for most people.
And it'd be a good base if more features/automation is needed later.

[Chaitanyabsprip]

I've made the requested changes.