cleanup documentations

[fuxingloh]

What kind of PR is this?:

/kind docs

What this PR does / why we need it:

Currently the front matter of the website is missing:

1. Logo
2. Branding & Copies
3. SEO Meta
4. SEO Optimized sharable page/content
5. Netlify SSO Plan requirement

This PR adds and implements all those required.

Additionally, severals improvements had been mad for docs.

1. /docs/testcontainers is separated into it's only docs category.
2. /docs/jellyfish is simplified and merged into one category.
3. A top section of each API indicates what the category is and how to access it.
4. A very clear interfaces/protocols to define the API contract is included for each RPC.

Which issue(s) does this PR fixes?:

Fixes #62

Additional comments?:

• Updated all npm description in package.json to use DeFi Blockchain keyword
• Added a WIP masthead on top of the docs website.

[netlify]

Deploy preview for jellyfish-defi ready!

Built with commit 9020d38

https://deploy-preview-86--jellyfish-defi.netlify.app

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
packages/jellyfish/dist/jellyfish.umd.js	15.66 KB (0%)	314 ms (0%)	135 ms (-2.04% 🔽)	448 ms

[codecov]

Codecov Report

Merging #86 (9020d38) into main (56aa664) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #86   +/-   ##
=======================================
  Coverage   93.30%   93.30%           
=======================================
  Files          15       15           
  Lines         254      254           
  Branches       30       30           
=======================================
  Hits          237      237           
  Misses         15       15           
  Partials        2        2           

Impacted Files	Coverage Δ
...ish-api-core/__tests__/container_adapter_client.ts	100.00% <ø> (ø)
packages/jellyfish-api-core/src/category/mining.ts	100.00% <ø> (ø)
packages/jellyfish-api-core/src/category/wallet.ts	100.00% <ø> (ø)
packages/jellyfish-api-jsonrpc/src/index.ts	96.77% <ø> (ø)
packages/jellyfish-json/src/index.ts	90.00% <ø> (ø)
packages/jellyfish-api-core/src/index.ts	100.00% <100.00%> (ø)
packages/jellyfish/src/jellyfish.ts	100.00% <100.00%> (ø)

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