[Outreachy Task Submission] Added translation for the "add new post" button for all available languages

[kivuvarosekivuvan]

Engineers Checklist

What this PR does?

• Adds translation on the "add new post" button for all the available languages because the button initially was in english across all the languages.

How can it be tested?

• Launch the local server
• Login/signup to the platform
• Navigate to the language setting at the top right part of the (default) page
• Chose a specific language and check on the "add new post" button on the sidebar to confirm if language changes.

Where is it documented?

• It's documented on an issue I raised : [Outreachy Task Submission] The Text of the "Add New Post" button does not Change According to the Selected Language. platform#4814

What would be the Impact of this solution

• Users will be able to use the platform comfortably and create posts in the language they understand best. It promotes inclusivity and improves the overall user experience.

UI Update

The button translated -- some few language demo

[kivuvarosekivuvan]

@ushahidlee and @Angamanga, I have developed a solution from an issue I raised, could you kindly review this and give me your thoughts

[MugoBrian]

Hello @kivuvarosekivuvan , this PR is solving multiple issues according to your commits. Or are the first four commits related to the last commit?

Tip: If not, it's advisable to separate those related commits into another PR, one PR fixing the issue of the cancel button in the popup modal, the second PR for fixing the Add new post button for all available languages issue.

[Angamanga]

Thank you @kivuvarosekivuvan! While this is an excellent and valuable contribution, our translations are actually stored in and fetched from a tool called transifex, and that is where all translations except the en.json gets added. Translations are one of the ways we want to be able to accept translations for and we are still figuring out the workflow, but if you are interested in adding translations, please let me know and I'll give you access to Transifex 🙏 🙏 . Approving this since it is a valid addition and useful data, but I will not merge it since it will just be overwritten when we pull data from Transifex.

[Angamanga]

@Angamanga Translations for Transifex.

[kivuvarosekivuvan]

@Angamanga Thank you the approval 🙏. I am very excited 🙂 to work on this because it presents a crucial area for improvement / accessibility in the platform and learning. Kindly add me to Transifex