docs: Icon updates (tidbyt#334)

* icons: Update documentation for icons.

This commit updates the schema documentation for icons to match the icon
validation in the community repo.

* icons: Update icon usage.

This commit updates all examples to use icons that will validate in the
community repo.

fix: Remove quotes from qrcode. (tidbyt#316)

This commit fixes a bug where the URL contains quotes.

modules: Add QRCode module. (tidbyt#315)

* modules: Add QRCode module.

This commit adds a module to generate QR codes to pixlet! This native QR
code integration can be used to create promotional apps.

* Updated example

* Fix random seeding

* Address PR feedback

feature: Add fill colors to render.Plot() (tidbyt#310)

* feature: Add fill colors to render.Plot()

This commit adds the ability to add a fill color to a plot to override
the alpha calculation.

* Fix docs

fix(277): Add tests and put keepdir back. (tidbyt#294)

This commit adds tests for tidbyt#277 and adds back in the keepdir for the
static directory.

encode: quantized palette for GIFs (tidbyt#293)

encode: quantized palette for GIFs (tidbyt#293)

Fix WrappedText Linespacing (tidbyt#271)

* Fix WrappedText Linespacing

* Modified wrappedtext_test.go to pass tests

There may be still a discrepancy though?

cc @betterengineering

bugfix: Pin goreleaser version. (tidbyt#270)

This commit pins the version of goreleaser we are using.

Revert "bugfix: Fix static linking. (tidbyt#256)" (tidbyt#269)

This reverts commit 2fd1466.