refactor[entrypoints]: add Fusebox codename to fusebox entrypoint

[hoxyq]

Summary

Instead of updating the template for every entrypoint, we now will be updating the title in the build script. We keep a pre-defined dictionary of all rn-specific entrypoints.

Naming DevTools (React Fusebox ⚡) is open for discussion, might be not the best one.
UPD: renamed to React Native DevTools (React Fusebox ⚡).

Test plan

Manually inspecting rn_fusebox.html and rn_inspector.html.

Upstreaming plan

• This commit should be sent as a patch to the upstream devtools-frontend repo. I've reviewed the contribution guide.
• This commit is React Native-specific and cannot be upstreamed.

[motiz88]

I'm OK with this (though specifying the name as part of each entrypoint, somehow, would be nicer).

Re: Naming - #36 makes it viable to go with React Native DevTools (Fusebox ⚡)

[hoxyq]

rn_fusebox.html:

rn_inspector.html:

[hoxyq]

(though specifying the name as part of each entrypoint, somehow, would be nicer)

I don't think there is a way for this currently, looks like all html templates for entrypoints are generated based on directories inside front_end/entrypoints and ninja configs:
https://github.com/facebookexperimental/rn-chrome-devtools-frontend/blob/9a23d4c7c4c2d1a3d9e913af38d6965f474c4284/front_end/BUILD.gn#L105-L140