* Fix index page missing from sidebar

* Hide legend for empty headings

* Fix legend item spacing

* add short chapter about the way we send errors back

* Rename a couple of routes and files to match titles

* add note about graphql error

* Edit "Getting Started" guide (1st pass)

* Adjust after meeting with Joe

* correct some typo's

* add missing punctuation

* change mutation wording

* fix lint error

* Improve line breaks and legend spacing

* Edit "Queries"

* rewrite computed-queries

* rewrite custom-updaes

* Edit "Mutations"

* add reading-on sections

* edit schema-awareness

* Add reference to request policies to "Document Caching" doc

* core-package.md update

* Edit "Errors"

* Edit "Basics" and "Concepts" index pages

* Add index page for "Advanced"

* update exchanges.md grammar

* update philosophy.md & stream-patterns.md

* move help.md

* Update basics code examples and mutation errors

* Remove "Common Questions" page

* Fix homepage styling

* Expand "Server-side Rendering" page with more content

* Update intro section of "Testing"

* Add disclaimer and intro to "Auto-populate Mutations"

* Add table styling in mdx.js, remove required column(s)

* Add "Graphcache" index page content

* Fix typo in server-side rendering doc

* Add special styling for inline-code table cells

* adjust computed-queries

* remove spacing from api docs

* Add more explanation to "Normalized Caching"

* elaborate on partial results

* Edit "Custom Updates"

* Add initial "Showcase" content

* Upgrade react-static-plugin-md-pages (fixes raw HTML)

* Adjust "Showcase" styling

* Edit "API @urql/core" docs

* Edit "urql (React)" docs

* Fix links edge cases (sidebar and markdown links with hashes)

* Resolve TODO comments in the docs pages

* Add initial "@urql/exchange-graphcache" API docs

* Add finalised "@urql/exchange-graphcache API" content

* Remove frontmatter from help.md

* Update yarn.lock file

* Remove "Common Questions" reference from docs index page

* Add new installation instructions to "Auto-populate Mutations"

* Fix table formatting on Graphcache API page

* Add deployment stages to Circle CI

Add surge CLI

Exclude private packages from build

Add deployment tasks to docs

Add deploy scripts

Set threading limit for react-static

Call surge with yarn

Publish to surge using commit hash in subdomain

* basic loader implementation

* Fix mobile menu max width

* Deploy to PR_NUM instead of COMMIT_HASH

* add scroll to table on small vw

* add white-space pre to Pre code blocks
Co-authored-by: Jovi De Croock <decroockjovi@gmail.com>
Co-authored-by: Will Golledge <will.golledge@formidable.com>