FEAT: Add custom symbol style and custom code block language

[caupolicanre]

Hi! Yesterday, I was implementing this action on my personal README and instantly thought about 2 cool features that I'd like in this action. So first I made an issue requesting a new symbol to be added #489, but then forked the repo and started programming them by myself.

This PR has 2 new features:

• Custom symbol style
• Custom code block language

Custom Symbol Style

This feature allows the user to enter 2 symbols of their choice to customize their progress bars.

Created a new environment variable SYMBOL_STYLE where the flag can be set to "▰▱" (just an example) to change the style of progress bar (by default is empty). If the length of the string is not 2, the default symbol version will be used.
Then changed the logic to:

    if len(EM.SYMBOL_STYLE) == 2:
        done_block, empty_block = EM.SYMBOL_STYLE[0], EM.SYMBOL_STYLE[1]   
    else:
        done_block, empty_block = Symbol.get_symbols(EM.SYMBOL_VERSION)

So if there are 2 symbols in "SYMBOL_STYLE" it will use them, if not, will use "SYMBOL_VERSION".

Custom Code Block Language

This feature allows the user to enter the programming language of their choice to customize their code blocks.

Created a new environment variable CODE_BLOCK_LANGUAGE where the flag can be set to "python" (just an example) to change the language of code blocks (by default is "text"). Here is a list of the language code blocks supported by github. I preferred to simply add the link to the list of languages to the README, and not write it, so that it is not so long.
A verification can be added if you want. It could be an if statement to check if "CODE_BLOCK_LANGUAGE" is in the available languages list.

Example

Everything was tested in my personal repository.
Here is an example of my personal README where I'm using a custom symbol and python language for the code block:

I added the new documentation to the README explaining the two new environment variables.

I remain attentive for any questions.
Caupo.

[anmol098]

Great addition.
I'll have a look once and merge

[aravindvnair99]

@caupolicanre could you undo the formatting changes? Especially the one to action.yml

[caupolicanre]

@caupolicanre could you undo the formatting changes? Especially the one to action.yml

@aravindvnair99 I don't know why it shows a complete change on the whole file, I didn't change the formatting of it.
Just added the 2 new environment variables SYMBOL_STYLE and CODE_BLOCK_LANGUAGE on these lines.

I don't know if there is a way to go back to a previous version of the file in github (before the fork) and try adding again those lines. If there is a way to do that, let me know and I'll change it.

EDIT: Just used these commands to restore original action.yml in this commit:

git fetch upstream
git checkout upstream/master -- [action.yml]

Then added the 2 new environment variables in this commit.

[caupolicanre]

@anmol098 @aravindvnair99 PR is ready to review.
Already checked the requested changes and everything should be ready to merge!

I remain attentive for any questions or changes needed.
Caupo.

[MarkenJaden]

I'd reeeaally like this change. Code looks good to me, I tested it on my machine.

Formatting changed were rolled back but still seem to occur, I'm also not sure why this happens, but it's working fine. I think this change can be dismissed.

[caupolicanre]

I'd reeeaally like this change. Code looks good to me, I tested it on my machine.

Thank you so much for reviewing my PR! I would also love this change in the main project, but as of today, I'm using my own fork to have this enhanced version.
I look forward to the addition of this feature.

[pseusys]

Great addition, thank you!
However, we can't merge without all the required workflows run successfully (or until @anmol098 relaxes this limitation 🌚)...