feat: New paths for backend API

[aadarsh-ram]

What

• Creates new paths for retrieval and updation of nodes in a taxonomy
• List of GET paths created:

Paths	Description
"/nodes"	Retrieves all node information in taxonomy
"/entry/{entry}"	Retrieves information on entry with id = {entry}
"/entry"	Retrieves all nodes with label "ENTRY"
"/synonym/{synonym}"	Retrieves information on synonym with id = {synonym}
"/synonym"	Retrieves all nodes with label "SYNONYMS"
"/stopword/{stopword}"	Retrieves information on stopword with id = {stopword}
"/stopword"	Retrieves all nodes with label "STOPWORDS"
"/header"	Retrieves information on header of taxonomy
"/footer"	Retrieves information on footer of taxonomy

• List of POST paths created:

Paths	Description
"/edit/entry/{entry}"	Editing an entry in taxonomy with id = {entry}
"/edit/synonym/{synonym}"	Editing a synonym with id = {synonym}
"/edit/stopword/{stopword}"	Editing a stopword with id = {stopword}
"/edit/header"	Editing header of taxonomy
"/edit/footer"	Editing footer of taxonomy

Part of

• Fixes Add GET methods in backend API #24
• Fixes Add POST methods for backend API #25

[alexgarel]

Cool @aadarsh-ram , you are on the right path.

Although I would have concentrated first on "entry" not the rest, because here you run the risk of having to fix lots of same errors on each API, while you could learn first on entries, and then do the rest (it's just an advice).

There are things to separate and factorize.

[alexgarel]

Really good @aadarsh-ram

I still request quite a lot of change so that we have a perfect code :-)

[alexgarel]

Just one single comment :-)
You understood previous comments very well.

[alexgarel]

Great work @aadarsh-ram,

Let's merge :-)