Cli improvements

[gwbres]

Convert existing (RINEX-cli) opmodes into clap::Subcommands.

The application has several opmodes that are exclusive.
Subcommands which are exclusive by nature, are the ideal way to depict them.

Subcommands then has several benefits

• it makes it easier to understand the CLI with one common panel and then subcommands
• each panel (including the subcommands) have their own "help" menu. So it makes it easier to document and easier to understand
• this drastically reduce the quantity of information we have to display:

I merged the RNX2CGGTTS binary into a RINEX-cli -p -cggtts opmode.
Indeed, this one uses the -p behavior, with a customized output. The previous implementation had the code duplicated.
It also required to update both applications on any dependency upgrade.

I renamed the previous "default opmode" to "--graph -G". Considering it's more data visualization oriented.

I'm also introducing a script to test the major applications. Since we're shipping those applications online now, it is almost mandatory to have more CLI/applications continuous integration.

Details

We only have a couple of commands that are shared accross opmodes:

• the general file loading infrastructure (-f, -d)
• the workspace and env definition (verbosity -q + workspace location -w)
• the RX antenna definition (RX position definition --rx-ecef/--rx-geo)
• the preprocessor: -P to filter data prior running an opmode

The current opmodes are (use -h for each of them):

• -i: identification opmode, documentation initiated in the Wiki.
• --split -s: documentation initiated in the Wiki
• --merge -m: documentation initiated in the Wiki
• --tbin: time binning opmode, documentation initiated in the Wiki
• -Q: quality check. See work in progress in the wiki
• -g: graph mode - See work in progress in the wiki
  It's basically the previous ""default"" opmode, that would generate
  Record visualization.

(1) is the general front panel: basically everything that is shared with other opmodes
(2) are the opmodes: you have to select one (and can only select one) to actually do something

Example of subcommand help/documentation :

(3): RNX2CGGTTS is now a precise positioning opmode. It makes maintaining this operation easier.
It reduces the code quantity: can share the solver logic. It allows sharing the Solver configuration file -c...

[lnicola]

rinex-cli/src/file_generation.rs looks like another empty file.

[lnicola]

Rubber-stamping this, I can't really review it properly.

[gwbres]

rinex-cli/src/file_generation.rs looks like another empty file.

Hum, I don't have this one on my side.
It did exist at some point indeed, but it was either merged someplace else and partially replaced by the current fops.rs

[lnicola]

Right, sorry, the GitHub display is a bit misleading:

vs.

[gwbres]

Yeah indeed, I spotted that one and removed it.
The new fops infrastructure regroups this kind of thing.
It could benefit some more logic for the process of file creation, because we happen to do the same thing in a couple of places.
Will try to improve that aswell