fix: Standardizes the way we build

[betterengineering]

Overview

We have several different ways to build this repo currently:

• The method outlined in the build docs, which is now not working
• The method in the Makefile
• The method in the github action file
• A private method defined internally at Tidbyt 😄

This change standardizes the way we build this repo so there's less confusion around how it's built. Additionally, any changes to the way we build pixlet will work the same way in CI and local development.

Changes

• Remove font embedding from build.
  • I added this when I was doing a lot of font work, but now that I'm not it really is annoying to generate fonts each time. This commit makes it so the only target for build is a clean.
• Remove build directory in make.
  • This is unnecessary and I feel bad for adding it. I've removed it so that a build places the binary in the root.
• Updated build to use make.
  • This commit updates the build to use make so there is one way to build things.
• Updated build docs.
  • This commit updates the build docs to use the one true way to build this repository.

Tests

mark@dev-mark:~/code/src/tidbyt.dev/pixlet|mark/fix-build-docs ⇒  make build
rm pixlet
go build -o pixlet tidbyt.dev/pixlet

mark@dev-mark:~/code/src/tidbyt.dev/pixlet|mark/fix-build-docs ⇒  ./pixlet
Pixlet renders graphics for pixel devices, like Tidbyt

Usage:
  pixlet [command]

Available Commands:
  completion  Generate the autocompletion script for the specified shell
  help        Help about any command
  push        Pushes a webp image to a Tidbyt device
  render      Runs script with provided config parameters.
  serve       Serves a starlark render script over HTTP.

Flags:
  -h, --help   help for pixlet

Use "pixlet [command] --help" for more information about a command.

[betterengineering]

Fixes #84